Temco 4 Gauge 18in - 5/16 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 & Second Hole Size: 5/16" 4 AWG, Copper Conductor Max Voltage: 600 V, Max Amps: 150 Nominal Outside Diameter: 0.348" / Stranding (qty. dia): 364/0.01"