Blue Sea Systems' Single Circuit ON-OFF is 300 Amps continuous rating for outboards and small gasoline or diesel engines. Tin-plated copper studs allow for maximum conductivity and corrosion resistance. Studs accept 3/8" (M10) ring terminals and 7/8" stud length accepts multiple cable terminals. Blue Sea Systems one-piece terminal stud design never loosens over time. One-piece stainless flange nuts ensure safe and secure connections. Isolating cover protects rear contacts and breakout tabs allow wire access in any direction.