Heavy Duty On & Off Battery Switch - 600AThe heavy-duty 422768 selector switch has 350A continuous and 1500 cranking amps to start a dual diesel engine. 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 mounted Ignition protected Safe for installation on gasoline-powered boats Constructed of injection molded nylon with machined brass contacts CE certifiedSpecifications:Length (inch): 4"Width (inch): 4"Depth (inch):  3-5/8" Amps: 350