The Matrix 4.5 Inch Square Compact Fluorescent Non-IC New Construction Frame-In Kit is made of galvanized steel and accommodates ceilings up to 1.25 inch. Non-IC designation requires that insulation be kept a minimum of 3 inches away from housing. Includes non-dimmable 120/277V electronic ballast. One 26/32 watt, 120 volt 4-Pin Triple Tube compact fluorescent lamp is required, but not included. 10 inch width x 9.5 inch depth x 5.75 inch height. UL listed for damp locations. A complete fixture includes a frame-in kit and a trim kit, sold separately.