Three position off-on-on. First on position energizes one circuit. In second on position both circuits are energized. Mounting stem 1-1/4" long. 3/8" dia. Brass hex back-up nut, chrome plated brass face nut and chrome plated knob. 25amp@ 6VDC, 15 amps @ 12VD(MP39570 has a plastic knob and 3 screw type terminals) (MP39590 has a brass knob and 3-male 1/4" blade terminals)

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Christine