3000 Series NW3000LM 3.5 Inch 42-50 Watt GU5.3 MR16 Halogen Non-IC AirTight Long New Construction Housing with Magnetic Transformer is made of 18 gauge galvanized steel and cannot be in direct contact with insulating material. Below ceiling accessible. Designed for 12 volt, 42-50 watt GU5.3 base MR16 halogen lamp, sold separately. Wattage determined by trim option selected (see attached manufacturer specification). Includes 120V/12VA magnetic transformer. Can fit in ceilings up to 7/8 inch thick. UL listed for damp locations. Ceiling cutout 3 5/8 inch. Housing dimensions: 15.25 inch length x 10 inch width x 5.5 inch height. A complete fixture consists of a housing and trim. Trim and lamp sold separately.