Halo, H99ICAT, Recessed Lighting Housing, Line Voltage New Construction Shallow, 120 V AC, 4-3/8 in Ceiling Opening, Incandescent Lamp, IC Insulation, Ceiling Mounting, For Use With: Halo Recessed Downlight Fixture, Accent and Task Lighting, 4 in Diameter, 6 in Height, 11.4 in Width, Aluminum Housing Material