Combination clothes dryer heat saver and lint trap. Provides extra heat and humidity from clothes dryer into room. Damper handle to vent air inside or outside. Removable and reuseable easy-to-clean lint filter. For use with 4" flexible duct or metal pipe. Includes 2 stretch clamps. Recommended for electric dryers only. Color: White. No. CHK100ZW6: Color: White Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!