Square Control Damper Blade Type Extruded Airfoil Frame Material 1/8 ga. Extruded Aluminum Blade Material 1/8 ga. Extruded Aluminum Max Velocity 6000 fpmFrame Width 9-3/4 In. Frame Depth 5 In. Frame Height 9-3/4 In.Duct Width 10 In. Duct Height 10 In. Axle Dia 1/2 In. Axle Plated Steel Max Temp 180 Degrees F Pressure Differential Max 6 in wg Bearings Synthetic (Acetal) Sleeve Type Seals TPE Blade Stainless Steel Compression Type Jamb