Crouse-Hinds Standard outlet box features steel construction for longer endurance. It has four 1/2-Inch knockouts in sides and five 1/2-Inch knockouts in bottom. This octagon box measures 4-Inch x 4-Inch. It has maximum capacity of 15.5-Cubic-Inch. It is suitable for use with conduit. Labor-saving mounting bracket ensures easy positioning of box along studs or joists. Box is UL listed.