MICRO SWITCH™ Sealed Aero Switches, Corrosion Resistant Steel Plunger and Key Way in Bushing Polarizing Key of Receptacle aligned, MIL - S - 8805 symbol 3, Pin Plunger Actuator, Lead Wire Termination, 2 X SPDT Circuitry, Silver - Copper Comp Edgelay Contact, 4 Amp Resistivity and 2 Amp Inductive at 28 Vdc, Plunger Seal Meterial VITON A.