End Cap For Nominal Duct Diameter 4 in Inlet Diameter 4 in Material Steel Overall Length 2 in Product Type End Cap Material Thickness 26 ga Maximum Pressure Rating 3 in wc Standards ASTM A653 and A924 SMACNA Finish Galvanized Overall Height 2 in Shape Cap Connection Type Press Fit Overall Width 4 in Minimum Pressure Rating 3 in wc