NLIC-401QSAT Low Voltage AirTight IC Housing$$Tools

Width: 10.75" Length: 17.75" Height: 7.75" Ceiling OpeningDiameter: 4.375? Uses one 50 watt MR16 GU5.3 12 volt halogen light bulb Power supply required: 12 volts Rated for interior damp installation Safety certification: UL (Underwriter's Laboratory) listed