Lightolier LyteCaster Collection Shallow type 6-3/4-Inch convertible frame-in kit includes housing and mounting frame. Kit contains junction box, mounting bars socket housing and screws. This 0.032-Inch aluminum housing accommodates incandescent lamp that has medium base porcelain socket. This Airseal® housing reduces air leakage to less than 2 CFM at 1.57 PSF. Socket features impact extruded aluminum or galvanized steel housing. Mounting frame has 0.048-Inch galvanized steel construction. Junction box features 0.032-Inch galvanized steel construction. Junction box measures 2-Inch x 4-Inch x 3-1/2-Inch. Mounting bars have 0.059-Inch galvanized steel construction. Kit is UL listed.