Discharge Cap For Fan Diameter 21 in For Fan Type Tubeaxial Mounting Hole Diameter 5/8 in Material Galvanized Steel Body Diameter 23 7/8 in Bolt Circle Diameter 21 1/2 in Finish Unfinished For Use With 3NXF4 Includes Damper Maximum Inlet Air Temperature 200 Degrees F Metal Material Thickness 1/2 in Overall Height 26 in Overall Length 29 in Overall Width 29 in Product Type Discharge Cap