This 30.5 mm head for illuminated push-button provides an ergonomic interface for controlling your machine.It is easily installed and replaced on compatible complete push-button units and contact blocks via snap-fit assembly.It is clearly distinguishable visually at a distance thanks to its illuminated clear color.It is vibration resistant, impact resistant, high pressure washer resistant and dust resistant thanks to its IP69 protection, making it ideal for operation in harsh environments.