Designed for Circular DuctsDamper Blades Formed from Aluminum H14Stainless Steel Torsion SpringSynthetic Rubber Gasket0.9-in Diameter Brass Central Rod...
Designed for Circular DuctsDamper Blades Formed from Aluminum H14Stainless Steel Torsion SpringSynthetic Rubber Gasket0.9-in Diameter Brass Central Rod...