The Harmony XB4/ZB4 series made of metal offers a wide range of 22 mm and 30 mm control and signaling devices such as push buttons, indicator lights, and selector switches, including emergency stop switches. Thanks to the modular design of the devices, all components can be purchased as individual elements, in assemblies, or as complete devices. Due to their quality, flexibility, and extreme robustness (protection classes up to IP69K), these devices are ideal for most applications in industry and buildings. This ergonomic key switch front element in black has 3 positions and is spring-loaded to the left center. The front element is mounted in a 30 mm hole. It is secured with a shock-resistant connection screw. To create a complete device, this front element can be combined with a mounting flange as well as a variety of different auxiliary switches and accessories. In addition to high vibration resistance and a very long lifespan, the XB4/ZB4 series devices also feature an extremely high possible ambient temperature. Due to the numerous existing product standards and certifications, they are suitable for international use. Thanks to the Green Premium environmental label, you can obtain detailed information about material contents, environmental impacts, and circular economy, which support your sustainability goals.