Backdraft damper for circular ducts, manufactured from galvanized sheet metal. The two blades are spring-loaded. Every damper is built with performance in mind. The damper can be mounted vertically.
- Damper blades formed from aluminum H14
- 3/32" diameter brass central rod
- Stainless steel torsion spring
- 24 Gauge, G90 galvanized steel casing
- EPBM synthetic rubber gasket