Product Description Features: Sizes: Suit For 5.1 Inch diameter exhaust hose Durable Materials: Portable Air Conditioner Window Kit Made of Heat Resistant Durable PVC Material Well-designed:Portable ac window vent kit Adjustable plate suits for your different window height Scope of application:Portable ac window seal kit Suitable for use at home, office, classroom?bedroom and more places Steps for usage 1.Install the screw and nut fittings on the outer plate to assemble, insert the oval metal piece into the track, and tighten the nut. 2. Install the Assembled window plate on the window 3. Install one end of the exhaust hose on the coupler of the portable air conditioner. 4. Install the other end of the exhaust hose on the universal adapter 5.Install the adapter on the window panel interface and it is ready to use.