Ply Gem 7-1/4 In. x 8-1/8 In. White Vinyl Mounting Blocks Pack options:Pack of 1 a non slip grip insert

a non slip grip insert

and heavy-duty polypropylene bracing system

wood concrete

Certified flood debris clearance is demonstrated with a 3" diameter opening when the flood door is activated

Swivels 180 Deg

Ply Gem 7-1/4 In. x 8-1/8 In. White Vinyl Mounting Blocks Pack options:Pack of 1 a non slip grip insertThe UniBlock, universal J Block mounting block is used to install exterior electrical outlets, water faucets, light fixtures, mailboxes, house numbers, and doorbells. Richwood mounting blocks are built to withstand the toughest weather and retain their color and beauty over the life of the home. They will not chip, crack, or split. They are simple to install and have a 2 piece design that easily adjusts from 1 2" to 1 1 4". This feature allows for