EZ-Flow Dryer Vent Box - Recessed Hookup Venting Kit For Flex Hose Connector - Prevent Kinked Hose & Fire Hazards - Improve Clothes Dryer Appliance Efficiency - Inset Dryer Exhaust Box Is Easy to Retrofit In Existing Home & New Construction. Durable White Plastic With Aluminium Duct Reduces Fire Hazard - Meets UL Standard 94 HB Tests for Flammability Saves Space - Improves Dryer Efficiency Installs Easily - New Construction - Easy Retrofit For Existing Homes Allows you to push your Dryer Flush Against The Wall