The 1-piece design can be used after siding installation to mount all types of accessories. Compatible with Double 4″ or Double 5″ siding profiles. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements. Rich textured appearance. Surface dimensions: 6-3/4″ x 6-3/4″. Projection: 3/4″. Knockouts: Round 1″ diameter; rectangle 2-3/8″ x 3-3/4″. Limited lifetime warranty. No. EZBLK040 PW: Surface Dimensions: 6-3/4″ x 6-3/4″, Flange Dimensions: N/A, Projection: 3/4″, Round Knockout: 1″ Dia, Rectangular Knockout: 2-3/8″ x 3-3/4″, J-Channel Inside Dimensions: N/A, Material: Vinyl, Color: White, Pkg Qty: 1 No. EZBLK040 EQ: Surface Dimensions: 6-3/4″ x 6-3/4″, Flange Dimensions: N/A, Projection: 3/4″, Round Knockout: 1″ Dia, Rectangular Knockout: 2-3/8″ x 3-3/4″, J-Channel Inside Dimensions: N/A, Material: Vinyl, Color: Gray, Pkg Qty: 1 No. EZBLK040 PC: Surface Dimensions: 6-3/4″ x 6-3/4″, Flange Dimensions: N/A, Projection: 3/4″, Round Knockout: 1″ Dia, Rectangular Knockout: 2-3/8″ x 3-3/4″, J-Channel Inside Dimensions: N/A, Material: Vinyl, Color: Clay, Pkg Qty: 1 No. EZBLK040 A7: Surface Dimensions: 6-3/4″ x 6-3/4″, Flange Dimensions: N/A, Projection: 3/4″, Round Knockout: 1″ Dia, Rectangular Knockout: 2-3/8″ x 3-3/4″, J-Channel Inside Dimensions: N/A, Material: Vinyl, Color: Tan, Pkg Qty: 1