Jet Cap For Nominal Duct Diameter 8 in For Duct Height 8 in For Duct Width 8 in Inlet Diameter 8 in Material Steel Overall Length 13 1/4 in Product Type Jet Cap Inside Diameter 8 in Material Thickness 22 ga Weight 33 lb Maximum Pressure Rating 42 in wc Maximum Temperature Rating 390 Degrees F Finish Galvanized Color Silver Overall Height 18 3/8 in Shape Cap Connection Type Clamp Together End Type Quick-Fit Overall Width 13 1/4 in Minimum Pressure Rating 2 in wc