2000AIC Lytecaster 3.75 Inch Aperture Incandescent Insulated Ceiling, AirSeal Frame-In Kit is made of aluminum and galvanized steel and can be used for direct contact with thermal insulation. AirSeal housing minimizes air leakage and reduces heat loss and condensation on ceiling. Accommodates all ceilings up to 1 inch thick. 3 11/16 inch ceiling cut out. 9 5/8 inch length x 7.5 inch width x 5.5 inch height. UL listed. Suitable for damp locations. Lamp type and wattage dependent on trim kit and frame-in kit combination per attached manufacturer spec sheet. A complete fixture includes a frame-in kit and trim kit, sold separately.