About the Vapikirv Outdoor Light Mounting Block:Material? UV rated plasticNobig hole is needed on your vinyl sidingPerfectfor outdoor Paintable surfaceThe built-in electrical box design makes it very easy to install. Run wires through center punch hole. Safer to have your wires in a box. Size 6.9 Inch W X 10.2 Inch H. If you find that your vinyl siding is not suitable, it doesn't matter. You can placed some caulking and then painted the blocks and molding. You will need to caulk around the top of the box to prevent water from infiltrating the electrical box. There is a weep hole on the bottom that needs to be left open to allow any water that does deep in behind the block to escape.After Buying Service : We are pleasured to help you. Please note that we are always here to help. Please contact us through Amazon if you have any questions or inquiries.