Discharge Cap For Fan Diameter 16 in For Fan Type Tubeaxial Mounting Hole Diameter 1/2 in Material Galvanized Steel Body Diameter 24 in Bolt Circle Diameter 16 1/8 in Finish Unfinished For Use With 4C660 4TM81 Includes Clam Shell Damper Maximum Inlet Air Temperature 200 Degrees F Metal Material Thickness 3/8 in Overall Height 21 1/8 in Overall Length 24 in Overall Width 24 in Product Type Discharge Cap