Size – 10 w x4 h is the size for the duct opening measurement only actual front end outer dimensions are 11.75 width x 5.75 height. Design – Multi-shutter damper with handle operator - screws included. Quality Packaging – Carefully... more
Size – 12 w x 12 h is the size for the duct opening measurement only actual front end outer dimensions are 13.75 width x 13.75 height. Design – Multi-shutter damper with handle operator - screws included. Quality Packaging – Carefully... more
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