Specifications: Easy to use and install. 4 terminals, 22mm mounting hole, 1NO + 1NC contact type, red mushroom emergency stop latching push button switch with yellow cap. Used widely to control the electromagnetic starter, contactor, relay and other automatic control electric circuits. Item Name: Emergency Push Button Switch Operating Current: 10A Contact Type: 1 NO (Normally Open) + 1 NC (Normally Closed) Action Type: Self Locking Operating Voltage: 660V Fit Max. Panel Thickness: 6mm/0.24" (Approx.) (Adjustable) Mount Hole Diameter: 22mm/0.87" (Approx.) Size(Max. D x H): 60mm x 70mm/2.36" x 2.76" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included: 1 x Emergency Push Button 1 x Yellow Warning Cap