4in Dryer Vent Cover Outdoor Wall With Cushioned Non Return Flap,external Extractor Wall Vent,stainless Steel Vent Cover [Function] 4 Inch metal dryer vent cover design for use with dryer vent hose. Durable, Rust & Weather Proof function, Suitable for residential housing and industrial facilities use [High Quality] The vent covers for home are made of high-quality 304 stainless steel, With Durable, Weather & Rust Proof functions. The vent cover flap could prevent birds, cold air, rain from entering [Multi ] Our dryer vent cover outdoor is compatible with dryer vent hose or metal duct. Perfect for bathrooms, campers, garages, kitchen, sheds, RV etc. Suitable for room exhaust and ventilation use [Easy to Install] Step 1. Select the proper location according to the hose size . . Measure & mark the screw location for the vent. Step 3. Drill the Hole. Step 4. Install the screws and insert the duct Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Silver Material:Stainless steel Size:4In Package Contents: 1 * dryer vent cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.