Rainproof galvanized steel enclosure. Single phase, 3 wire, insulated/bondable split neutral, 10 (1") spaces, 20 poles, 120/240 volt AC. Main breaker type BR at 10,000 AIC. Includes feed thru lugs for both phase and neutral conductors. With hub closure plates, hubs and ground bar kit (necessary for sub-feeding) sold separately. Tin plated aluminum bus bar. Twin neutral with non-removable cross bus connecting them. When bonded, unused neutral connections may be used for equipment ground protectors in service entrance application. #4 - 1/0 wire range. Electrostatic powder coat, baked urethane painted. Rotate 180 degrees for bottom feed; orientation of main breaker handle consistent with NEC 240-81 requirements because it operates horizontally. 14-5/16" x 18-3/4" x 5-3/16". UL Listed file E52977.