List damper as duct size – damper will be 1/4″ smaller
• Galvanized: Standard
• Aluminum: Aluminum with stainless steel set screws/bronze bushings
• Stainless steel: All stainless steel
• Galvanized or stainless steel (both with cast handles)
• Above quadrants with 2″ standoff in galvanized, aluminum or stainless steel.