Halo New Construction Air-Tite Housing for Insulated ceilings-4 Inch Aperture. These are insulation contact rated for attics, etc. I installed a bunch of these years ago and had these 4 left over in the basement. Includes a box of 4 units. One is missing the electrical box cover. HALO Part number is H99ICAT. $20 or best offer for all 4.
