HVAC Duct Start Collar, 12\ Round Snap Together Sheet Metal
- 4" Plastic inline round duct connector with backdraft damper..
- Outside dimension of the duct fits 4" inch flex or solid ducting pipe..
- Assembly: Press on chosen duct - flexible or straight - and use montage glue. tape or steel clamps tighten the connection..
- Connect dryer duct, exhaust or any other duct that needs only one way airflow with this backdraft preventer to ensure required air direction, and remove polluted air from accessing habitable areas..
- perfect for Heating. cooling or air conditioning - HVAC. bathroom and kitchen air exhaust. Heat-resistant from: 5 °F to 160 °F..