Camco 47440 Black 5/16" Stud 18" Long 4-Gauge Marine Battery Cable and Lug Assembly Tinned 4 AWG wire, fits 5/16" stud Heat resistant up to 105C dry Tin plated 95% copper lugs for superior corrosion and oxidation resistance Type 3 boat cable wire stays ultra flexible even in the most extreme conditions UL 1426 listed and manufactured to the highest ABYC standards