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Retractable Vertical Window Fan, Window Exhaust Fan, Adjustable 35-150cm with 5cm Extra Retraction, Variable Speed 0-280 Function: 5CM retractable design for easy installation without compatibility concerns. Features a three-stage caliper stBest Value AMSXNOO 
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Vertical Window Fan,Window Exhaust Fan for Sliding Windows,14cm Retractable Window Fans,Adjustable Speed 0-2800 Rpm, Adj Quickly removes odors and heat, dispels cooking fumes, odors, and hot pot smells, and blocks heat and humidity for a heaGeneric 
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