Dimart Red Mushroom Cap 1NO 1NC DPST Emergency Stop Push Button Switch AC 660V 10A 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. The switches are structured compactly and operated quickly and gently. For emergency stop in industry with the conspicuous red mushroom cap. Easy to install which is very convenient to use.