Tjernlund Bd-4Spring Return Backdraft Damper For 4 Inch Ducts Rubber Gaskets

Description

Tjernlund Bd-4Spring Return Backdraft Damper For 4 Inch Ducts Rubber Gaskets
Summary
Model Number BD-4
Material Steel
4" spring loaded back draft damper
Galvanized steel collar
Aluminum damper blades
Rubber gaskets for tight seal
Easy installation
Description
Backdraft dampers with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for positive closure against interior gasket.