This siding box kit includes the box w/flange only. It works on all siding types, and can be installed before or after siding is up (new construction or retrofit). Mounting holes are provided on the inside of the box and along the flange. The box is UV rated, textured, and paintable to match any siding or trim. The box measures 6.250" x 6.250", the depth of the box is 1", and the box has a volume of 15-1/2" cubic inches. To mount this box with siding already up, simply score and break off flanges before mounting.