This Harmony XB4, plain lens flush red button head with transparent cap is used for insertion of legend, operates with a spring return / impulse mechanism. This button head with transparent cap provides an ergonomic interface for controlling your machines. It is easily installed and replaced on compatible complete push button units and contact blocks via snap-fit assembly and used for insertion of legend. It is clearly distinguishable visually at a distance thanks to clear color. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Its wide range of operating temperatures from -40C to 70C allows versatility in usage of product.