1PK Ply Gem 5-1/4 x 7 Tan Vinyl Mounting Blocks

The split recessed J-Block mounting block has a patented hinge that allows for ease of installation without removal of electrical receptacles and water faucets. Manufactured with ultraviolet-stabilized color minimizing the effects of exposure to the elements. Compatible with all siding profiles. Rich textured appearance. Surface dimensions: 5-1/4 x 7 . Flange dimensions: 5-7/8 x 7-1/2 . J-Channel internal dimension: 3/4 adjusts to 1-1/4 . Knockouts: Rectangle 2-1/4 x 3-7/8 .