Ply Gem 4-7/8" x 5-7/8" White Vinyl Mounting Blocks

The UL electrical mounting block is designed to mount light fixtures or electrical outlets. Includes electrical box and mounting block. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements. Rich textured appearance. 2-piece design surface dimensions: 4-7/8" x 5-7/8". Flange dimensions: 7-1/8" x 8-1/8". Siding receiver: 5/8" , adjusts to 1-1/4". Color: White. Limited lifetime warranty.