Cooper Lighting 3037348 4 in. Housing Recessed Light Fixture pack of 6 Features Air-tite fixture sealed and gasketed to prevent airflow between attic space and living areas The inner housing can be removed from plaster frame to provide access to the junction box Thermal protector deactivates fixture if overheating occurs due to improper lamping or misapplied insulation For providing accent and task lighting in non-insulated ceiling or where insulation can be kept 3 from housing Junction box has four 1/2 trade size conduit knockouts with true pry-out slots Specifications Size: 4 in.