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.