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Chimney Balloon 12-in W x 12-in L Plastic Chimney Damper
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Stops cold drafts, bad flue odors, bats, birds, and bugs from entering your home through the chimney
Inflates wall to wall, so it creates a very tight seal as it conforms to the size and shape of the flue hole
The multi-layer acid-resistant membrane holds up to the abrasive and acidic environment in the chimney
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