1. Compact Size: This siding mounting block kit is 6.53 inches wide and 10.23 inches long. It is a perfect solution for vinyl siding with a height of 4 inches and a double 1/2 inch wide lapped siding surface. The mold and block are paintable after caulking. 2. Easy to Install: This siding mounting block kit with built-in electrical box is super easy and fast to install on vinyl siding. 1. Drill holes in the siding lap and pass the wires through the holes on the outside. 2. Remove the knockout from the electrical box and insert the cable connector into the hole. 3. Pass the wires through the cable connector and mount the box with the several screws included. 4. Place the exterior lights in the appropriate position on the electrical box. (Warm Tips: To prevent water from seeping into the distribution box, the top of the distribution box must be caulked (except the drainage hole at the bottom)) 3. Siding Blocks: The siding mounting blocks are made of sturdy UV-resistant plastic, have a long outdoor life, and fit tightly to the siding. Vinyl siding light mounting blocks feature multiple wiring options to pull wires to the light, making it easier to add lighting to existing siding. 4.Wide Application: The siding mounting kit allows the light fixture to be mounted on all types of siding, including T-111 and HardiePlank Lap Siding. The built-in distribution box makes it easier to add lighting to existing siding.