Steel enclosure Single phase, 3 wire, solid neutral 6 spaces, 12 circuits, 6 tandem breakers accepted, 120/240 volt 10,000 AIR No PK7GTA ground bar sold separately 70 amp maximum back feed main circuit breaker Slot/square drive screws, 3 ground bar mounting locations Straight in main design Tangential main service knockouts No.8 - No.1 AWG main wire Style 2 box - 8.88 in. x 12.57 in. x 3.80 in. UL Listed