This Harmony XB4, flush button head without cap operates with a latched push-push mechanism. This button head without cap allows users to customize it with any compatible desired cap to support your machines and operating functions. 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 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 -40°C to 70°C allows versatility in usage of product.