Sea-Dog Heavy Duty On & Off Battery Switch - 600A One Size. The battery selector switch isolates and/or combines two battery banks (422768). Installs with four #10 RH fasteners (not included).Features:Can be surface or rear panel mountedIgnition protectedSafe for installation on gasoline-powered boatsConstructed of injection molded nylon with machined brass contactsCE certifiedSpecifications:Length (inch): 4"Width (inch): 4"Depth (inch): 3-5/8"Amps: 350 Specifications for Sea-Dog Heavy Duty On & Off Battery Switch - 600A: Manufacturer: Sea-Dog Color: Red/Black Package Contents: Sea-Dog Heavy Duty On & Off Battery Switch - 600A Sea-Dog 422768-1: Heavy Duty On & Off Battery Switch - 600A One Size