8x4 Register Box, 5 in. Collar, R6

Crown Products Company R6 register boxes connect a duct collar to a register opening. Box sizes range from 6x6 to 12x6, with collar sizes from 4 in. to 8 in. depending on the box. A gasket around the register opening seals the box where it penetrates the building envelope. - R-value: 6 - Black interior - Solid corners with hanger holes - 1/2" drywall flange - 5 hole cluster for register attachment