Carlon 3-5/16 in. Rectangle New Work 1 Gang Outlet Box - Volume 21 Cubic Inches, Length 3.65 Inches, Width 2.25 Inches, Depth 3.32 Inches, Color Blue, Material PVC, Mounting Means up to 1-3/4 Inch Adjustable Bracket. Ideal for new work or retrofit (old work) applications. Backless low voltage bracket and floor box designs available. Ideal for various drywall thicknesses and wall finishes. PVC construction for easier installation, greater performance and lower installation cost. Patented design allows for adjustment from 0 in. to 1-3/4 in. after installation. Designed and listed for use with non-metallic sheathed cable in accordance with Article 314 of the National Electrical Code.