NW4000E 3 inch low voltage Non-IC new construction housing. Cannot be used in contact with insulation and should be at least 3 inches away from insulation. Below ceiling accessible. 12 volt electronic transformer included. Takes up to 7/8 inch ceiling. One 35 watt, 12 volt GU5.3 MR16 bulb is required, but not included. Dimmable with a low voltage electronic dimmer. See attached manufacturer dimmer compatibility reference when using LED bulb option. Suitable for damp locations. UL listed. 3 5/16 inch ceiling cut out. 11.4 inch length x 7.3 inch width x 4.6 inch height. A complete fixture includes a housing and trim, sold separately.