Square D by Schneider Electric SC1624M125S Homeline 125-Amp 16-Space 24-Circuit Outdoor Surface Mount Main Breaker Combination Service Entrance Device Homeline 125 Amp 16-Space 24-Circuit Ring-Type Surface Mount Main Breaker Overhead/Underground Main Breaker CSED Accommodates plug-on secondary surge arrestor and features a plug-in design for easy installation Use type HOM circuit breakers, Rated 120/240Vac, 4 jaw meter socket NEMA type 3R enclosure