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For use with GreenSeam+ snap pipe (sold separately), a self-sealing duct for commercial and residential applications. Pipe is engineered with a LEED qualifying zero-VOC gasket; eliminates additional sealing along the longitudinal seams and transverse joint. When fitting is used with GreenSeam pipe, the design can reduce energy costs and increase overall system efficiency. Item: Collar W/Damper Duct Fitting Diameter: 7" Duct Fitting Length: 5" Width: 10" Duct Fitting Material: Galvanized Steel Gauge: 26 Duct Fitting Item: Collar W/Damper Height: 6" Coating: Galvanized Pressure Rating: 3" W.G Standards: SMACNA / ASTM Special Features: Pre-Sealed, Low Leakage Hardware For Use With: Greenseam Duct system