Single-pole, triple-throw switch permits four connection modes: Battery One, Battery Two, two batteries in parallel, or both off. Rated for 230-amps continuous, 345-amps momentary. For 6-Volt to 32-Volt D.C. systems. Includes alternator field circuit disconnect to prevent surges. Selector has positive click positions. Bakelite housing with brass terminals, and brass nuts. Install with #10 screws. Size: 5-1/2" diameter, 2-3/4" deep.