Square D™ Homeline™ Main Breaker Loadcenter, 1-Phase Convertible Neutral, 120/240 VAC, 100 A, 1 Pole, 50/60 Hz Frequency, 22 kA Interrupt, 40 Circuits, HOM Breaker, Panel Breaker Mounting, 3-Wire Wiring Configuration, 20 Spaces, 6 to 1/0 AWG, 6 to 2/0 AWG Wire, Flush/Plug-On/Surface Mounting, NEMA 1 Enclosure, 7 Enclosure Box, Steel Housing Material, 14.25 in W x 3.75 in D x 20.92 in H Dimensions