Halo, 4", Non-Insulation Contact Recessed Housing, Remodel Recessed Housing, Air-Tite, Insulation To Be 3" Away From Fixture, Integral Thermal Protector, Junction Box Listed For Through Circuit Wiring, 4 Each 1/2" Knock Outs, 4 Each Non-Metallic Knock Outs, Pry Out Slots & Strain Relief, 4 Remodel Clips Secure Housing & Accommodates 1/2" & 5/8" Ceiling Materials, 5"H x 4-1/4" Opening, UL, CSA, Damp Locations, IP Rated, UPC Bulk.