The RF405L is a 4” aperture low voltage housing for use in new construction applications to provide accent and task lighting. The RF405L is designed for insulated ceilings and can be in direct contact with ceiling insulation. The RF405L offers a wide choice of trim types including reflector, wall wash and retractable trims. This AIRTIGHT housing design prevents airflow through ceiling for saving heating and air conditioning costs. Double wall aluminum housing. 7-5/8” height allows use in 2“ x 8” joist construction. Housing adjusts for ceilings up to 1-1/4” thick. Listed for through branch circuit wiring. (Max.8 No. 12 AWG 90°C branch circuit conductions (4 in, 4 out)). (5)1/2” knockouts with true pry-out slots and (4) knockouts with Romex cable clamp. Ground wire provided. Mounting frame: Galvanized steel construction. 14-7/8” L x 9-1/8” W. Rigid structure that allows for easy installation without warping or moving. Male/Female design, that will slide easily through the channel to ensure smooth installation. Break-off feature, allows it to be shortened without tools, for narrower joist spacings. Can be mounted to the long and short sides of the housing when a tight-fit or perfect positioning is an issue. Drop down feature allows for easy access to the wiring compartment. Pre-installed nail prevents the nail from going on an angle and causing the hanger bars to be repositioned. Double headed nail to allow easy removal of housing. Foot located right below the nail for perfect height alignment on the joist. Integrated T-Bar support clip for suspended ceilings. Ceramic socket with aluminum heat shield for Bi Pin MR16 lamps. Lamp: One 12V, 50W Max. MR16 lamp. 12V Magnetic 50W Max. Lifetime warranty on the transformer. Self resetting thermal protector in transformer deactivates fixture if overheating occurs due to improper lamping or misapplied insulation. Quick Connect push-in terminals Three “Quick connectors” for very fast and easy wiring. cULus listed for damp locations. cULus listed for feed through.