The SuperPro / SuperVent Storm Collar is used to seal the gap between where the chimney pipe comes through the roof flashing when passing through the roof. The Storm Collar wraps around the SuperPro / SuperVent pipe tightly and sits over the cone of the roof flashing. A bead of silicone will need to be applied around the storm collar where it meets the chimney pipe. SuperPro and SuperVent models are compatible with each other according to the manufacturer. The 6 in. & 8 in. diameters are the SuperPro model (compatible with SuperVent). The 7 in. diameter is the SuperVent model (compatible with SuperPro). Special Order: 7" available upon request, please contact us for quote. Measurement Chart: Selkirk SuperPro / SuperVent Storm Collar Size 6" 7" 8" A 8" 9" 10" B 5.5" 5.5" 5.5"
