Boxes, Square, Appleton, Type: 4-11/16" with knockouts, with green ground wire, 1-1/2 Depth Inch, Volume: 29.5 Cubic Inch, Sides Knockout: 10@ Eccentric KO, Bottom Knockout: 1@1/2", 1@3/4", 2@ Eccentric KO, UL Standard: 514A, UL Listed: E2527, NEMA OS-1