8" Galvanized Barometric Gas Damper with Thimble Kit - A8-BT-G
This damper is used to regulate drafts on gas-fired appliances, including furnaces, boilers, and water heaters. Comes with thimble kit to make installation easier.
Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.