Ply Gem 6-3/4″ x 6-3/4″ Clay Vinyl Mounting Blocks

The 1-piece design can be used after siding installation to mount all types of accessories. Compatible with Double 4″ or Double 5″ siding profiles. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements. Rich textured appearance. Surface dimensions: 6-3/4″ x 6-3/4″. Projection: 3/4″. Knockouts: Round 1″ diameter; rectangle 2-3/8″ x 3-3/4″. Limited lifetime warranty.