This Harmony XB4, flush green button head with clear silicone membrane booted operates with a spring return / impulse mechanism. This clear silicone booted button head provides a simple solution to comply with hygiene requirement in food, beverage industries as well as healthcare and pharmaceuticals. It is easily installed and replaced on compatible complete push button units and contact blocks via snap-fit assembly. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP69K. 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. The clear boot prevents growth of bacteria in joints and gaps, it makes this product ideal for high hygiene environments.