Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Best Choice Uenede 
Uenede Brass Hose Barb Fittings, 1/4" NPT Male to 1/4" Barbed Air Hose Fittings, Brass Air Line Repair Connectors for Co NPT thread size is a nominal pipe size and it does not represent the actual diameter. Please check the dimension drawingBest Value HALLMERS 
HALLMERS Brass Straight 10mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS 
HALLMERS Brass Straight 12mm 1/2" Barb Hose to 1/2" NPT Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Red This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS 
HALLMERS 1/2" BSP Male to 3/4" BSP Male Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing Ada This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS 
HALLMERS Brass Straight 25mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Generic 
1pcs Brass Hose Barb Fitting, 1/8" 1/4" 3/8" 1/2" BSP Male Thread Elbow 90 Degree 6/8/10/12/14/16mm Barbed Coupler Conne Hose Barb Elbow material: Weld Short Elbow Pipe Fitting made of Brass, with a Good seismic performance, good corrosion rHALLMERS 
HALLMERS Brass Straight 8mm Barb Hose to 3/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer C This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.uxcell uxcell Brass Barb Hose Fitting, 90 Degree Elbow 6mm Barbed to 1/8 PT Male Pipe Adapter Connectors 2pcs Product Name: Barb Hose Fitting; Size: 6mm Barb x 1/8 PT Maleuxcell uxcell Brass Barb Hose Fitting, 90 Degree Elbow 6mm Barbed to 1/8 PT Male Pipe Adapter Connectors 2pcs Product Name: Barb Hose Fitting; Size: 6mm Barb x 1/8 PT MaleX AUTOHAUX X AUTOHAUX 2 Pcs 19mm Outer Diameter Barbed to 3/4" BSP Hose Barb Tail Male Thread Adapter Brass Hose Socket Compression Application for motorcycle, car and truck.HALLMERS HALLMERS Brass Straight 16mm 5/8" Barb Hose to 3/8" NPT Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Red This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 3/8" BSPT Male to 1/8" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.EMSea EMSea 2PCS 6mm to 1/2 Inch BSP Female Thread Barb Brass Fitting Connectors Hose Barbed Joint Adapter Coupler for Fuel Ai 1/2 Inch BSP internal thread to 6mm barbed hose tail fitting connector.EMSea EMSea 2PCS 8mm to 1/2 Inch BSP Female Thread Barb Brass Fitting Connectors Hose Barbed Joint Adapter Coupler for Fuel Ai 1/2 Inch BSP internal thread to 8mm barbed hose tail fitting connector.ZoXureShop 21 PCS Premium Drip Irrigation Fittings Kit. Versatile 1/2" to 1/4" Connectors Ideal for Efficient Watering. Featuring B Comprehensive Watering System: Transform your gardening experience with a 21-piece irrigation kit featuring tees, elbowsHALLMERS HALLMERS Brass Straight 12mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 1/8" BSP Male to 3/8" BSP Male Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing Ada This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.EMSea EMSea 2PCS 10mm to 1/2 Inch BSP Female Thread Barb Brass Fitting Connectors Hose Barbed Joint Adapter Coupler for Fuel A 1/2 Inch BSP internal thread to 10mm barbed hose tail fitting connector.HALLMERS HALLMERS 3/4" NPT Male to 1/4" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS 3/8" BSPT Male to 1/4" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Briny River Briny River 4PCS Brass Barb Hose Tail Connectors M8 x 1.0 to 6mm HoseFor Marine Air Fuel Systems One end of the connector is M8 x 1.0 metric thread which can be connected with various compatible equipment without slipHALLMERS HALLMERS 1" NPT Male to 3/4" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing Ada This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.16% Off Kisangel Kisangel 100pcs Drip Irrigation Barbed Hose Connectors, 4/7mm PVC Drip Irrigation Connector for Tubing Garden Vegetable Versatile application: irrigation connectors ideal for vegetable gardens, flower beds, lawns, gardens, farms, home, greeHALLMERS HALLMERS 1/4" BSPT Male to 1/4" NPT Male Brass Pipe Fitting Coupler Thread Plumbing Hose, Hex Threaded Bushing Tubing Ad This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.sourcing map sourcing map Brass Barbed Fitting 1/4" NPT Female to 5/16" Hose ID for Home Brew Pipe Fitting Direct Thread Connector Du Size - Thread Size: 1/4" NPT, Hose Compatibility: 5/16" Hose ID, Total Length: 1.42 inches, Barbed Length: 0.91 inch, BaHALLMERS HALLMERS 1/8" BSP Male to 1/4" BSP Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Bushing Threaded Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.QZWEXAZ 2Pcs White Thickened Pool PVC Fittings, 2" × 1-1/2" Male Thread Barbed Hose Fittings with Good Sealing, Versatile Pool P Size Design: The thread outer diameter is 2in, barb fitting outer diameter is 1-1/2in, fits corresponding inner-diameterHALLMERS HALLMERS 1/2" BSP Male to 1/2" NPT Female Brass Pipe Fitting Connector Thread Plumbing Hose, Hex Head Threaded Tubing Ad 1pc Threaded Pipe AdapterAcbbMNS AcbbMNS 5Pcs Brass Hose Barb Fittings, 1/4" BSP to 10mm Barb Hose Fitting Connector, Barbed Joint Adapter Air Hose Pipe 【Size】5-Pack 1/4 Inch BSP male thread to 10mm barb hose pipe fitting tail connectors.Hallmers HALLMERS 1/8" BSPT Male to 1/8" NPT Male Brass Pipe Fitting Coupler Thread Plumbing Hose, Hex Threaded Bushing Tubing Ad This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.GOLD DEER GOLD DEER 12Pcs Hose Barb Fitting 3/8" Barb to 1/4" NPT Male Thread Hose Barb Adapter Connector 1/4" NPT to 3/8" Barb Ho Packaging Includes:Insert 3/8xNPT1/4 inch outer wire pagoda insert *12, tape *1.HALLMERS HALLMERS 3pcs Brass Barbed Fitting M6 Male Thread x 6mm Barb Hose Connector Metric Adapter Coupler M6 Male Metric Thread x 6mm BarbHALLMERS HALLMERS 3/8" BSP Male to 1/2" BSP Male Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing Ada This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 3/4" BSPT Male to 3/8" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.TopHomer 3 Pcs Solid Brass Pipe Fittings Barbed Thread Tail Connector Pipe BSP Male 12mm to 1/2" for Air Water Fuel Oil Gas HIGH QUALITY - Hose connectors are made of high quality brass, anti-rust and long lasting.HALLMERS HALLMERS 3/8" BSP Male to M10 x 1.0mm Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHALLMERS HALLMERS 1/4" BSP Male to 1/4" NPT Female Brass Pipe Fitting Connector Thread Plumbing Hose, Hex Head Threaded Tubing Ad 1pc Threaded Pipe AdapterKalolary Kalolary 20PCS Locked Barbed Tee Connectors, 1/2" to 1/4" Drip Irrigation Fittings Kit 12/16mm to 4/7mm Tube Lock Female 【Durability and Sturdiness】Our 1/2 drip irrigation fittings barb tee is made of hard plastic, which is strong and lastinHallmers HALLMERS Brass Straight 4mm Barb Hose to 1/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer C This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS M8 x 1.0mm Male to M10 x 1.0mm Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threa 1pc Threaded Pipe AdapterHALLMERS HALLMERS 3/8" NPT Male to 3/8" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Bushing Threaded Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Jotron Barbed Connectors for Drip Irrigation Systems, 4mm and 7mm Tube Fittings for Custom Garden Layout, 100-Pack Durable Plas Versatile Connector Set: Effortlessly connect and extend 4mm or 7mm tubing, specifically for 4mm and 7mm tubing, to creaHALLMERS HALLMERS 1/4" BSP Male to 3/8" BSP Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Bushing Threaded Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass 3/4" BSP Male to 1/4" BSP Female Pipe Fitting Coupler with Hex Head, 15mm Length Threaded Tubing Adapter This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.KOOTANS KOOTANS 32PCS Brass Hose Barb Fittings Barb to NPT Male Thread Adapter Kit 3/16" 1/4" 5/16" 3/8" 1/2" Barbed Air Hose Fi 32 PCS PACKAGE: The brass hose barb fittings kit includes 10 sizes barb male coupler, 3/16″ barb x 1/8" NPT 2pcs, 3/16″HALLMERS HALLMERS M10 x 1.5mm Male to M10 x 1.0mm Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Thre 1pc Threaded Pipe AdapterHALLMERS HALLMERS Brass 3/8" BSP Male to 1/8" BSP Female Pipe Fitting Coupler with Hex Head, 12mm Length Threaded Tubing Adapter This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.ERGAOBOY ERGAOBOY Pack of 10 10mm Outer Diameter Barbed to 1/4" Female BSP Fittings Brass Hose Socket Compression Fittings Size: 10mm OD x 1/4" BSP SocketsHALLMERS HALLMERS Brass Straight 19mm Barb Hose to 3/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS M18 x 1.5mm Male to 1/2" BSP Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHOINCO 21 PCS Drip Irrigation Fittings Kit for 1/2 inch to 1/4 inch Irrigation Tube Anti-Drop Premiun Quality Fitting,Barbed Lo 【1/2 in to 1/4 in Drip Irrigation】You will receive 2 tees, 1 on/off valve, 6 T-connectors, 3 6-way connectors, 2 elbows,HALLMERS HALLMERS 1/8" NPT Male to 1/8" BSP Female Brass Pipe Fitting Connector Thread Plumbing Hose, Hex Head Threaded Tubing Ad 1pc Threaded Pipe AdapterHALLMERS HALLMERS 3/4" BSP Male to 1" BSP Female Brass Pipe Fitting Reducer Connector Thread Plumbing Hose, Hex Bushing Threaded This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.EMSea EMSea 2 Pcs 6mm to 1/4 Inch BSP Female Thread Barb Brass Fitting Connectors Hose Barbed Joint Adapter Coupler for Fuel A 1/4 Inch BSP internal thread to 6mm barbed hose tail fitting connector.TopHomer Stainless Steel Barb Hose Fittings, 10mm to 15mm Female Thread Barbed Joint Adapter Pipe Connector Adapter for Fuel Gas Reliable Material: The hose tail end connector is made from 304 stainless steel with high hardness and corrosion resistaFrienda Frienda 40 Pcs Barbed Tee 1/2 Inch Tubing (1/2" IDx0.6-0.63" OD) 16mm to 1/4 Inch Irrigation Tube Irrigation Fittings Dr Package Information: you will receive 40 barbed tees in the package, black and green, 20 of each color; Reliable accessoHALLMERS HALLMERS Brass 14mm Barb to 1/2" BSP Female Thread 90 Degree Elbow Fitting Connector, Threaded Hose Pipe Tubing Connecti This is a handy brass elbow fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.14% Off EMSea EMSea 2 Pcs 1/4inch/6mm Brass Barbed Hose Fitting Coupler Connector with 1/4 Inch Male BSP Thread Pipe Nipple Fitting fo This fitting has a 1/4 Inch BSP male thread with a barbed hose tail.HALLMERS HALLMERS Brass 3/8" BSP Male to 1/4" BSP Female Pipe Fitting Coupler with Hex Head, 11mm Length Threaded Tubing Adapter This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass 1/4" BSP Male to Female 100mm Threaded Straight Pipe Fitting Extension, Adapter Coupler Reducer Converter This is a handy brass pipe extension commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 1/4" NPT Male to 1/4" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Bushing Threaded Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 1/2" BSPT Male to 1/8" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.X AUTOHAUX X AUTOHAUX 2 Pcs 12mm Outer Diameter Barbed to 1/2" BSP Hose Barb Tail Female Thread Adapter Brass Hose Socket Compressi Application for motorcycle, car and truck.HALLMERS HALLMERS 1/8" BSP Male to 1/4" NPT Female Brass Pipe Fitting Connector Thread Plumbing Hose, Hex Head Threaded Tubing Ad 1pc Threaded Pipe AdapterHallmers HALLMERS Brass Straight 8mm 5/16" Barb Hose to 3/8" NPT Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Red This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Odorkle Odorkle Thru Hull Fitting, 1 Inch 316 Stainless Steel Straight Barbed Hose Connector with Half Threaded Interface, for B [Versatile Marine Applications] Ideal for a wide range of marine applications this straight thru drain fitting is perfecHALLMERS HALLMERS M12 x 1.5mm Male to 1/4" BSP Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHALLMERS HALLMERS Brass Straight 10mm Barb Hose to 3/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS M16 x 1.5mm Male to 1/4" BSP Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHALLMERS HALLMERS 1/2" BSPT Male to 3/8" NPT Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Threaded Bushing Tubing This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 1/2" BSP Male to 1" BSP Female Brass Pipe Fitting Reducer Connector Thread Plumbing Hose, Hex Bushing Threaded This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.X AUTOHAUX X AUTOHAUX 2 Pcs 10mm Outer Diameter Barbed to 1/2" BSP Hose Barb Tail Male Thread Adapter Brass Hose Socket Compression Application for motorcycle, car and truck.Hallmers HALLMERS 1/4" BSP Male to M12 x 1.25mm Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Thread 1pc Threaded Pipe AdapterHallmers HALLMERS 1/4" BSP Male to 1/2" BSP Female Brass Pipe Fitting Reducer Thread Plumbing Hose, Hex Bushing Threaded Tubing A This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.ezqnirk 5PCS Metric Male Thread to Hose Barb OD Brass Barbed Pipe Fitting Coupler,M5x0.8 to 5mm HALLMERS HALLMERS M22 x 1.5mm Male to 1/2" BSP Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHALLMERS HALLMERS Brass 1/4" BSP Male to Female 150mm Threaded Straight Pipe Fitting Extension, Adapter Coupler Reducer Converter This is a handy brass pipe extension commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS M6 x 1.0mm Male to M10 x 1.0mm Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threa 1pc Threaded Pipe AdapterHALLMERS HALLMERS Brass 1/2" BSP Female to Male Thread 90 Degree Elbow Fitting Connector, Diameter Nominal DN15, External Threade This is a handy brass elbow fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS 1/4" BSP Male to 3/8" NPT Female Brass Pipe Fitting Connector Thread Plumbing Hose, Hex Head Threaded Tubing Ad 1pc Threaded Pipe AdapterHALLMERS HALLMERS M16 x 1.5mm Male to 1/2" BSP Female Brass Pipe Reducer Fitting Connector Thread Plumbing Hose, Hex Head Threade 1pc Threaded Pipe AdapterHALLMERS HALLMERS Brass Straight 16mm Barb Hose to 3/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 8mm Barb Hose to 1/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer C This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 16mm Barb Hose to 3/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 10mm Barb Hose to 3/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 14mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 12mm Barb Hose to 1/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 6mm Barb Hose to 1/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer C This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 14mm Barb Hose to 1/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 12mm Barb Hose to 3/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 6mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer C This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 12mm 1/2" Barb Hose to 1/2" NPT Female Threaded Barbed Pipe Fitting Connector, Adapter Coupler R This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 14mm Barb Hose to 3/8" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 12mm Barb Hose to 3/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 19mm Barb Hose to 3/4" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.Hallmers HALLMERS Brass Straight 19mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 16mm Barb Hose to 1/2" BSP Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Reducer This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.HALLMERS HALLMERS Brass Straight 6mm 1/4" Barb Hose to 1/2" NPT Male Threaded Barbed Pipe Fitting Connector, Adapter Coupler Redu This is a handy brass barbed fitting commonly used to connect lines for air, water, fuel, oil, and inert gases.