Box is significantly smaller and lighter while maintaining optimum wire-bending space. Side mounted main breaker allowstop or bottom feed. Sturdy copper bus and galvanized box increase durability and reliability; tinplated for corrosion resistance. Minimum 100 per cent neutral terminations. All neutral holes rated for 14-4 wire. Extruded neutrals are easier to wire, reducing installation time and cost. Combination slotted/Robertson screws speed wiring. Accepts GE Q-Line branch circuit breakers, including GE's exclusive 1/2" THQPs. Interior removes and reinstalls easily. Main breaker not included. (8) 1" circuits or (16) 1/2" circuits. 12-5/8" x 12-3/8" 3-3/8". UL Listed.