1Pack greenseam gr6pocr10ga26d collar w damper 10 in duct dia galvanized steel 26 ga 12 in w x collar w damper duct fitting diameter 10 in duct fitting length 5 in width 12 in duct fitting material galvanized steel 26 gauge collar w damper height 6 in coating galvanized 3 in w.G standards smacna astm pre-sealed low leakage hardware for use with greenseam duct system
