The 4 in. Dryer Duct to Wall Connector provides a secure and stable connection of the dryer to the wall. It simplifies dryer maintenance and overall safety by providing a simple, easy and quick access point to the dryer duct for cleaning of lint and debris on a regular basis. The innovative threading system on this product allows for easy attachment to the duct.Quick connect product is easy to installProduct connects to all types of 4 in. flexible and semi-rigid ductsNo clamps required for the installation of this connectorSnaps together for easy connect/disconnect