Two-circuit, On-On (SPST: Single Pole, Single Throw). 12V DC. For mounting on gear shift lever with a clamp (not supplied). Red plastic knob, 1 1/4" (31.8mm) diameter. Three female bullet terminals. Zinc diecast case with protective rubber boot. For use with 40102. Replaces: Diamond T/Reo 9935-H, 319305, Dodge 1390517, Eaton 32861, Ford 8QH-4078, SW-1535, GMC 2274282, International 79348-R91, Mack IMR-201, White 716913.