Block, Universal Mounting; Siding Style: Vinyl; Box Type: J Block; Box Height x Width - in: 8.5 x 7.5 in.; Box Depth - in: Adjusts 1/2 to 1-1/4 in.; Material: Vinyl; Color: Cream; Knockouts: Round (4 in. Dia.), Rectangle (2-3/8 x 3-3/4 in.); Standard Package: 10 Two-piece Systems; Manufacturer Series: UNIBLOCK
Additional Info: For use with light fixtures. Surface: 7-3/16 x 8-3/16 in.