Carlon 5-7/8 in. Rectangle New Work 3 Gang Outlet Box - Volume 53 Cubic Inches, Length 3.53 Inches, Width 5.66 Inches, Depth 3.50 Inches, Color Blue, Material PVC, Mounting Means Nails. Will not crack or break in extreme environments. Resists flexing, hold their shape. Molded-in flanges and clamps. Faster installation. Noncorrosive and nonconductive. Listed for masonry walls.