This push button switch is based on a simple switch mechanism to control some aspect of a machine or a process. Their surface is usually flat or to accommodate the human finger or hand, so as to be easily pushed. Specification: Momentary Push Button switch Terminals: 2 Red or Black actuator SPST (single pole single throw) Rated voltage: 3A 250VAC Panel cut-out diameter: 12mm Dimensions: 39mm x 15mm x 15mm Package Includes: 1 x Momentary Self Reset Push Button Switch