IT3000CM 3.5 Inch Low Voltage Non-IC Shallow Remodel Housing is designed for non insulated remodel applications. 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 35 watt, 12 volt GU5.3 MR16 bulb is required, but not included. Dimmable with a low voltage magnetic dimmer. Consult with bulb manufacturer for low voltage magnetic dimmer compatibility when using LED bulb option. Suitable for damp locations. UL listed. 3 5/8 inch ceiling cut out. 13 inch length x 4.7 inch width x 3.7 inch height. A complete fixture includes a housing and trim, sold separately.