This GE PowerMark Gold 125 Amp 4-Space 8-Circuit Outdoor Meter Socket Load Center has a 1-piece copper buss which is tin plated to resist corrosion. The center's extra-long neutral bar has 40 holes which accept 14 - 4 sized wire for a variety of wiring configurations. The breaker has a 10K AIC rating to protect wiring and circuitry.