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Use GreenSeam snap pipe duct and fittings from Grainger to help with your commercial and residential HVAC applications. Engineered with a LEED-qualifying zero-VOC gasket, this ductwork can eliminate the need for additional sealing along the longitudinal seams and transverse joint. Each box of metal duct contains five 5-ft. sections, for a total of 25 ft. Shop Grainger for self-sealing duct and fittings and all your HVAC supplies!