Description
For standard 3-1/4 x 10 in duct. Damper spring controlled.Open/closing damper prevents outside elements from entering the ventDamper is spring loaded to keep damper closed when not in use
For standard 3-1/4 x 10 in duct. Damper spring controlled.Open/closing damper prevents outside elements from entering the ventDamper is spring loaded to keep damper closed when not in use
For standard 3-1/4 x 10 in duct. Damper spring controlled.Open/closing damper prevents outside elements from entering the ventDamper is spring loaded to keep damper closed when not in use
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