Reducer, Duct Fitting Diameter 12 in x 8 in, Duct Fitting Length 8 in, Width 12 in, Duct Fitting Material Galvanized Steel, 26 Gauge, Reducer, Height 8 1/8 in, Coating Galvanized, 3 in W.G, Standards SMACNA / ASTM, Pre-sealed, For Use With Greenseam Duct system