NW7000M 4.25 Inch Low Voltage Non-IC New Construction Housing is designed for new construction applications and damp locations. Non-IC designation requires that insulation be kept a minimum of 3 inches away from housing. Below ceiling accessible. Takes up to a 7/8 inch ceiling thickness. Low voltage 12 volt magnetic transformer included. One 37-50 watt, 12 volt GU5.3 MR16 bulb is required, but not included. Wattage dependent on housing/trim combination. Dimmable with a low voltage magnetic dimmer. Consult bulb manufacturer for low voltage magnetic dimmer compatibility when using LED bulb option. Suitable for damp locations. UL listed. 4 5/16 inch ceiling cut out. 13.5 inch length x 7.38 inch width x 4.6 inch height. A complete fixture includes a housing and trim, sold separately.