This siding box kit includes the box w/flange, siding block, and a non-metallic (NM) cable connector. 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. Both the box and siding block are UV rated, textured, and paintable to match any siding or trim. The cover measures 7.142" x 13.490", the depth of the box is 1.819", and the box has a volume of 24-1/2" cubic inches. To mount this box with siding already up, simply score and break off flanges before mounting.