Ply Gem 6.625 in. x 6.625 in. White D4 and D5 Surface Mounting Block

The Cellwood D4 and D5 Surface Mounting Block is used to mount accessories after Double 4 in. or Double 5 in. lap siding has been installed. It helps present a level transition from siding to mounted fixtures. Cellwood Mounting Blocks are built to withstand the toughest weather and retain their beauty and color throughout the life of your home.