Width: 4", Height: 4", Depth: 2 - 1/8" (30.3 Cubic Inches) MC Clamp for Metal Clad Cables, FB Bracket for offset mounting on flat side of stud or joist For Fixture/Luminaire Support of 50 lbs or less Contractor Pack of 24 Switch Boxes 16 GA Sheet Steel, Welded, Galvanized Boxes are used to install lighting fixtures, switches, and receptacles in ceilings and walls. They are constructed from 16 gauge galvanized steel. These 2-1/8" deep, welded boxes include metal clad cable clamps and knockouts for easy installation. This is a pack of 24 Switch Boxes. 4 x 4 x 2-1/8", Knock-Outs: Sides (2) - 1/2", (1) - MKO, (4) - Loom; Bottom (1) - 1/2"