Deflect-O 4 in. W X 5 in. L White Plastic Back Draft Damper

Brand Name: Deflect-O
*Opening Width: 4 in.
*Opening Length: 5 in.
*Color: White
*Material: Plastic
*Product Type: Back Draft Damper
*Exterior Length: 1 in.
*Exterior Width: 5 in.
*Keeps              cold air passing through duct
*Positive damper mounting slots and flow direction arrows for easy mounting