Nora Lighting NHIC-926QAT Quick Connect IC Air-Tight 6 Inch Sloped Ceiling Housing "IC" Housings are direct contact rated; no minimum clearance is required Ceiling thickness varies from 5/8"  1-3/8" Three adjustment points allow slight tilt of housing cylinder with slide and tilt adjustments for the socket. Bar hangers are adjustable from 13-5/8" to 24" and can be repositioned 90 degrees Quick connects provided