Road Power ST40-4 4-Gauge Side Battery cable, Black, 40-Inch. 4-gauge cable transfers power from battery to starter, 6 and 12-volt batteries. Terminal ends constructed of tin-plated brass, maximum energy lead-free design. PVC insulated jacket protects against oil, chemical, and is moisture resistant. Superior starting power, compared to leaded battery cables. Full gauge stranded Copper extends entire length of flattened lug, insures complete conductivity. Fits side terminal batteries. Industry Approvals: SAE Standards and RoHS Compliant. Full gauge stranded copper extends entire length of flattened lug insuring complete conductivity. The Road Power (R) brand is a registered trademark of Coleman Cable Inc.