Kicker BT4 Positive/Negative Competition Battery Terminal with 1/0-8 Gauge and 4-8 Gauge Output Positive/Negative Competition Battery Terminal with (2) 1/0-8 Gauge and (1) 4-8 Gauge Output Brass Construction.KICKER brass hardware uses Versa-Gauge connection points with oversized convex screws for rock-solid connections No fail battery terminal includes a negative post adapter collar that locks into place for tight grip and best connection Versa-Gauge Connection Points Wire Receptacles work with most size wire (1/0-8 Gauge or 4-8 Gauge)