This combination service entrance device has a ring type socket. Unit will only work with underground service. The interior has a single main service disconnect. Unit has a 400 A single phase current rating. It has a short circuit current rating of 25 kA. The meter socket bypass is a Type Class 320 with a manual bypass. This unit has a factory installed service disconnect. This unit is surface mount or can be converted to semi flush by using the appropriate flange kit. This unit will accept 4 AWG to 250 kcmil copper or aluminum wire. This combination service entrance device is 43.0 inches tall, 28.25 inches wide and 7.87 inches deep. This combination service entrance device is UL Listed.