It has a metal bezel
This emergency stop / shutdown button, also called EMS (Emergency Machine Stop) and EMO (Emergency Off)
is rasly easily installed into a standard 22mm diameter cut-outs and connected with simple screw-clamp connections
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
making it ideal for operation in harsh environments.