Boxes, General Purpose, Square, Appleton, Type: 4" with Nonmetallic Sheathed Cable Clamps, 1-1/2" Deep, Welded, 1-3/8" offset vertical bracket, set flush with front of box, Volume: 21 Cubic Inch, Type Clamp: CL-26, Sides Knockout: 2@1/2", 1@ Eccentric KO