Duct Collar; Type Starting, Press-On; Size 8 Inch; Body Pattern 6 Inch Long, Crimped, Riveted; Material Thickness 26 Gauge; Material ASTM A653/A924 G90 Galvanized Steel; Inclusions/Features Damper, Sealed Joint, Integral Gasket; Applicable Standard SMACNA, ES (ICC and PMG)