The Zip Box Blue 1-Gang 18 cu. in. Non-Metallic Ceiling Box is designed for use with non-metallic sheathed cable in accordance with Article 314 of the NEC. Great for residential and light commercial applications, the box is made with polycarbonate, is listed for use with masonry walls and can be used with 90C conductors. It meets NEMA OS-2 and is fire rated and UL listed for safety. Item includes integral ground lug where required by local electrical code.