XB4BS8442 - 

Harmony XB4 Emergency Stop Push Buttons
Schneider range of emergency stop push buttons from the Harmony range feature trigger action actuation. This eliminates the complicated decision of which emergency stop push button you need for the desired application and which standard it must conform to. This range is designed to comply with the two key standards IEC 60204 and ISO 13850. The Harmony XB4 range offers a metal series of emergency stop push button complete units with a range of push button diameters and operating types.