Medium Duty Battery Selector Switch - 250A ContinuousFeatures: For use with 6 two 50 Volt Marine Electrical Systems Capacity - 250 AMPS Continuous, 360 AMPS Intermittent When used with Non-Unitized Alternators, these models will interrupt the field current (reducing the possibility of damage) if turned "OFF" with the engine runningSpecs: Diameter: 5-1/4" Depth: 2-5/8"