Ply Gem 16-1/2" x 15-1/2" White Vinyl Mounting Blocks

The meter base J-Block is designed to mount large accessories such as hose racks and electrical meter bases. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements. Compatible with all siding profiles. Rich textured appearance. Surface dimensions: 16-12 IN x 15-12 IN. Flange dimensions: 18-12 IN x 16-34 IN. J-Channel internal dimension: 1-14 IN.