Square D™ QO® Main Breaker Load Center, 1-Phase Convertible Neutral, 120/240 VAC, 100 A, 1 Pole, 50/60 Hz, 22 kA Interrupt, 24 Circuits, QO Breaker, Panel Breaker Mounting, 3-Wire Wiring Configuration, 24 Spaces, 6 to 2/0 AWG Wire, Surface/Plug-On Mount, NEMA 1, 7 Enclosure Box, Steel Housing, 14.25 in W x 3.75 in D x 20.92 in H