Lightolier LyteCaster Collection 6-3/4-Inch Remodeler frame-in kit includes mounting ring, junction box and socket housing. Porcelain medium base socket features impact extruded aluminum or galvanized steel housing. Mounting ring has 0.032-Inch galvanized steel construction. Junction box features 0.032-Inch galvanized steel construction. Junction box measures 2-1/2-Inch x 2-1/2-Inch x 3-1/2-Inch. Kit is UL listed.