Gas Vent Adjustable Flashing, Round, Type B, 0 to 6/12 Pitch, 5-In. - 105825
Adjustable to 0 to 6/12 Pitch. Used where the vent passes through a roof. Underwriters Laboratories UL 441 and National Fire Protection Agency NFPA 54 and NFPA 211. Venting gas fired appliances, water heaters, furnaces, stoves, etc.