Halo, H550RICAT, Recessed Lighting Housing, Remodel, 120/277 V AC, 5-1/2 in Ceiling Opening, 20 W Lamp, IC Insulation, Ceiling Mounting, For Use With: Halo or All-Pro LED Module, Lighting Engines and Trim, 6 in Diameter, 8 in Height, 6 in Width, 13 in Depth, Aluminum Housing Material