GB Electrical Box, Cable Entry: Hinge, Number of Gangs: 1, Cubic Capacity: 18 cu-in, Round, Polycarbonate, Gray, 4.4 in W, 4.4 in D, 2.7 in H, Clamp, In-Ceiling Mounting, Suitable for: Non-Metallic Sheathed Cable and Up to 6 lb Light Fixture Installation, Includes: (2) Swing Clamps and Mounting Ears