Single phase, 3-wire, solid neutral, 2 spaces and 4 circuits maximum 1-pole, 1 QP breaker maximum 2-pole, 120/240 VAC. 10,000 AIR. One piece plated aluminum bus bar, heavier main bus for cooler operation, direct cable connection to bus bar. Main lugs and neutral on same plane, same drive tool. 100% circuit breaker twist outs. Positive load side circuit breaker hook rail. When used as service equipment, any unused neutral position may be used for equipment grounding. Simple upper pan adjustment after trim is installed for flush leveling. Rotate entire device 180 deg for bottom feed. Gray enamel finish. UL listed, complies fully with NEC and UL requirements for Class CTL. 5-1/8 in x 9-7/8 in x 2-5/8 in.