This Square D load centre with main breaker is ideal for use as service entrance panel. It comes complete with factory installed main breaker and cover. Breakers include: 10 x QO115 (HH# 3679-512) 1 pole 15 amp; 3 x QO215 (HH# 3679-567) 2 pole 15 amp; 1 x QO230 (HH# 3679-585) 2 pole 30 amp; 1 x QO240 (HH# 3679-594) 2 pole 40 amp. Specs are 100 amp ; indoor; 24 spaces; 22,000 A.I.C. It has combination slot/square head screws on all ground and neutral bars; split branch neutral; and shielded copper buss bars. It measures 21" x 14.25" x 3.75".