Easy Remodel: The Old Work Electrical Box features built-in clamps for quick and secure mounting within existing walls, no extra tools needed Multipurpose: This deep electrical outlet box is perfect for outlet, dimmers, GFCIs and thermostats Roomy Design: Boasting a 14 cubic inch capacity and a depth of 2-3/4 inches, our plastic electrical outlet box offers ample wiring space, secured by integrated cable clamps Durable Construction: This old work box 1 gang made with high-quality, rugged PVC, designed for use with non-metallic sheathed cables and the insulation is non-conductive UL Listed: All of CycevSun's electric boxes are fireproof for 2 hours, UL test certified, in line with national standards and requirements