Temco 1/0 Gauge 36in - 5/16 3/8 in Hole Sizes Red Solar Battery Cables Power AWG Solar Inverter Golf Cart Car GLUE SEALED Discount applied automatically when quantity lots are bought. First Hole Size: 5/16", Second Hole Size: 3/8" 1/0 AWG, Copper Conductor Max Voltage: 600 V, Max Amps: 285 Nominal Outside Diameter: 0.533" / Stranding (qty. dia): 988/0.01"