The Harmony XB4/ZB4 series made of metal offers a wide range of 22 mm and 30 mm control and signaling devices, including push buttons, indicator lights, and selector switches, as well as emergency stop switches. Due to the modular design of the devices, all components can be purchased as individual elements, in assemblies, or as complete devices. Thanks 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 mushroom push button front element in green is unmarked and tactile. The front element is mounted in a 22 mm hole, secured by a shock-resistant connection screw. To create a complete device, this front element can be combined with a mounting flange and a variety of different auxiliary switches and accessories. In addition to high vibration resistance and an exceptionally long service life, 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 that support your sustainability goals.