This Harmony XB5 emergency stop / shutdown 40mm mushroom red button head operates with a latched push-pull mechanism.It provides an ergonomic interface for controlling your machines.It is easily installed on compatible complete emergency stop and switching off push buttons.It is clearly distinguishable visually at a distance thanks to a clear color and a prominent 40mm mushroom shape.It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66.It makes it ideal for operation in harsh environments.