Professional, preferred quality meter socket for 100A continuous 600V, 3-wire, single phase service. Outdoor, ringless, 4-jaw, overhead or underground service design with no bypass. High-quality G90 steel, polyester-coated enclosure. No hub included. 8.5 In. x 12.25 In. x 4.5 In. UL (Underwriter's Laboratories) listed. Approved for areas that only require a UL listed ringless meter socket.