Backdraft dampers with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for positive closure against interior gasket. 4 in spring loaded back draft damper. Galvanized steel collar. Aluminum damper blades. Rubber gaskets for tight seal.
- 4 in spring loaded back draft damper
- Galvanized steel collar
- Aluminum damper blades
- Rubber gaskets for tight seal











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