Recessed 4-inch aperture ultra-shallow new construction housing for use with LED (light emitting diode) integrated trims. Suitable for 2x4 residential framing or shallow plenum commercial construction, type IC rated and can be used in direct contact with insulation. Airtight rating reduces airflow between living spaces and unconditioned areas providing additional energy savings. Features patented Got Nail hanger bracket, q-Channel bars with Pass-N-Thru, and Slide-N-Side junction box. Also includes Quick Connect push wire nuts, and a universal locking screw. Use with Halo LT4, RL4, RA4, SMD4, SLD4 LED integrated trims and the ML4 LED modular recessed lighting system. Air-Tite code compliant and cULus listed.