Carlon 3-1/2 in. Rectangle New Work 2 Gang Outlet Box - Vplume 35 Cubic Inches, Length 3.55 Inches, Width 2.11 Inches, Depth 3.50 Inches, Color Blue, Material PVC, Mounting Means Nails. SuperBlue boxes combine the features of the hard shell thermoset box and the thermoplastic PVC style box to create a new rigid non-metallic wiring box. SuperBlue boxes will not crack or break in extreme environments. Resist flexing and hold their shape even in the worst applications. Designed to nest inside each other to take up less space on the shelf or in the truck, while still providing the largest wirefill capacity in their class.