Nora Lighting NHRIC-27QAT Line Voltage Shallow Quick Connect IC Air-Tight 6 Inch Remodel Housing Direct contact allowed; no clearances are required Housing adjusts from 3/8"  1-3/8" to accommodate various ceiling thicknesses. Adjustable socket mounting plate allows for best possible light distribution High tension tempered steel springs secure remodel housings evenly to ceiling; hole cutout template provided for convenience. Junction box is listed for through branch circuit wiring and contains seven 1/2-in knockouts and four ROMEX pryouts with strain relief