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. 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 features 2 positions and is latching. 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 a very long lifespan, the XB4/ZB4 series devices also stand out due to their extremely high possible ambient temperature. With a wide range of existing product standards and certifications, they are suitable for international use. Thanks to the Green Premium environmental label, you can obtain detailed information on material content, environmental impact, and circular economy that supports your sustainability goals.