This 12" round damper will fit an inner flue diameter of 10 5/8 to 11 3/8.
Don't guess. Sizing can be tricky, especially if you are unfamiliar with the product. Take the time to review our sizing charts or contact us at 800 685 8263.
The Lyemance, Original Top Sealing damper seals with a silicone rubber gasket. When you close our damper warm air is sealed in and cold air is sealed out. Constructed of stainless steel and cast aluminum. It won't rust or warp. Lifetime warranty.