This 30mm key selector switch head, dom 8d1 provides an ergonomic interface for controlling your machine. It is easily installed/replaced on compatible complete key selector switch units and contact blocks via snap-fit assembly. It is clearly distinguishable visually at a distance thanks to its clear color. It is vibration resistant, impact resistant, high pressure washer resistant and dust resistant thanks to its IP69, IP67, IP66 protection, making it ideal for operation in harsh environments.