Features
• Designed for circular ducts
• Damper blades formed from aluminum H14
• Stainless steel torsion spring
• Synthetic rubber gasket
• 3/32" diameter brass central rod
• Designed for circular ducts
• Damper blades formed from aluminum H14
• Stainless steel torsion spring
• Synthetic rubber gasket
• 3/32" diameter brass central rod