Opening/closing damper prevents outside elements from entering the vent. Damper is spring loaded to keep damper closed when not in use. For 3-1/4 In. x 10 In. duct. Damper spring controlled. Aluminum. Mill finish.
selection not available, try a different combination
selection not available, try a different combination
Opening/closing damper prevents outside elements from entering the vent. Damper is spring loaded to keep damper closed when not in use. For 3-1/4 In. x 10 In. duct. Damper spring controlled. Aluminum. Mill finish.