AmeriVent® Storm Collar, Non-Adjustable, 3-1/2 in ID x 6-5/8 in OD Dia, Steel, Galvanized, Import
0.018 in Thk G-90 galvanized steel1-7/16 in HThe storm collar serves as a counter flashingUse mastic to seal the vent pipeFor use with type B gas vent system