4" B-Vent Storm Collar | 4MSC

The 4" B-Vent Storm Collar (Part Number: 4MSC) is designed to provide a secure seal for your B-vent system, ensuring efficient and safe venting. Compatible with L89-762 models, this storm collar features a 4" size and is listed and tested to UL 441 standards. The aluminum flue with galvanized casing, hemmed casing, and positive twist lock connection with SureLock tab make installation a breeze. Warning: Cancer and Reproductive Harm - www.P65warnings.ca.gov.