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Dampers & Chimney Caps > Dampers > Sealtight Dampers Products - Sealtight Dampers 8" X 8" Seal Tight Damper By US Fireplace Products Other Sizes: -- Choose a size -- 8" X 8" Seal Tight Damper 8" X 17" Seal Tight Damper 9" X 13" Seal Tight Damper 12" X 16" Seal Tight Damper 13" X 13" Seal Tight Damper 13" X 18" Seal Tight Damper 18" X 18" Seal Tight Damper 12" Round Seal Tight Damper