NICOR Lighting 4-Inch Non-IC Rated Universal Airtight Recessed Remodel Housing (19001AR) Integral thermal protector guards against improper lamping and misuse of insulation materials 5 1/2 in. height allows use in 2 in. x 6 in. joist construction Airtight housing limits increases energy efficiency through room insulation Adjustable socket bracket assures proper and consistent lamp positioning Supplied with 3 IDEAL push-in wire connectors