This non IC white powder-coated housing is AIR-TITE with a supplied gasket. For new construction housing, it prevents airflow between heated or air conditioned spaces and unconditioned attic areas. Socket for 12V MR16 halogen lamps. Fits 2" x 6" joist construction. From Halo lighting. White powder-coat finish. Socket for 12V MR16 halogen lamps. Fits 2" x 6" joist construction.