Temco 2 LOT 1 Gauge 18in - 5/16 1/2 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: 1/2" 1 AWG, Copper Conductor Max Voltage: 600 V, Max Amps: 240 Nominal Outside Diameter: 0.503" / Stranding (qty. dia): 780/0.01"