Selkirk LLC 4" GAS VENT STORM COLLAR

% No. 3RV-SC: Size: 3", B = 6-5/8" No. 4RV-SC: Size: 4", B = 7-5/8" No. 5RV-SC: Size: 5", B = 8-5/8" No. 6RV-SC: Size: 6", B = 9-5/8"