Butterfly Damper For Nominal Duct Diameter 10 in Inlet Diameter 10 3/4 in Overall Length 13 in Product Type Butterfly Valve Weight 6 lb Maximum Pressure Rating 10 in wc Maximum Temperature Rating 140 Degrees F Material PVC Seal Material Not Applicable Minimum Pressure Rating Not Applicable Standards ASTM D1784 Cell Class 12454 Shape Round Inside Diameter Not Applicable Outlet Diameter 10 3/4 in Overall Height 13 in Overall Width 13 1/4 in Color Dark Gray For Duct Shape Round