Perko Single Battery Disconnect Switch - Cup Mount. They can also serve as an emergency main disconnect switch in the event of an electrical problem.The Single Battery Disconnect Switch is Ignition Protected.Materials & FinishRed polycarbonate polymer body Black polymer actuator key Nickel plated terminals Specifications for Perko Single Battery Disconnect Switch: Manufacturer: Perko Color: Black Features of Perko Single Battery Disconnect Switch Rating: 140 Amps Continuous 200 Amps 5 Min. Intermittent 250 Amps 30 Second Start Cup Mount Installation Hole Size: 3" Nickel plated terminals Face Dimensions: 3" x 2-1/2" For use with alternators and generators 6-50 V.D.C. marine electrical systems Package Contents: Perko Single Battery Disconnect Switch Perko 9621DPC: Single Battery Disconnect Switch - Cup Mount