Square D™ QO™ Mounting Base, Type OEM, For Use With: QO™ QO-GFI, QO-AFI, QO-EPD Unit Mounting Circuit Breaker and Loadcenter, Specifications: 40 A at 120/240 VAC, 10 kA Interrupt Rated, 1-Phase, 2-Wire, 12 to 6/14 to 6 AWG Aluminum/Copper, 1-Pole 2-Spaces