Arlington 8081F-1 Siding Box Kit For Fixtures and Sided Structures, with Flange, 1 Pack, will smoothly allow you to mount galactic perpendicular fixtures of your choosing. The UV Rated integrative is to withstand drawn-out term use outdoors. This siding box kit will 1/2-inch or less type of siding, whether you have it up or not. The surface is also, allowing you to have a custom finished look to your projects. UL.