"ARLINGTON" SIDING MOUNT BLOCK KIT * Siding type: 1/2" lap * For smooth vertical mounting of light fixtures * Kit includes mounting block with built-in electrical box, non-metallic cable connector and 4 screws * Textured paintable UV rated plastic for long outdoor life * UL listed * Octagonal 6.625" x 6.625" outside diameter x .5" deep * Electrical box 4" diameter