This Schneider Electric Harmony 9001K modular red push-button has 2 positions, operates with spring return mechanism. It has a round shape with 35mm mushroom head. It fits in a 30mm hole. It has a chromium-plated metal bezel. This 35mm mushroom shaped push-button heads ideal for situations where quick actions are required for a process or machine to function correctly or where operator movements require maximum ergonomic. It is easily combined with Harmony range of contact blocks to perform a large variety of control functions. It is clearly distinguishable visually at a distance thanks to a prominent mushroom shape. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66, making it ideal for operation in harsh environments. Metal bezel. Ideal for severe environments, especially applications requiring high impact and vibration resistance. Simple modular design facilitates post installation servicing, modification and adaption of machines by non-specialists. Designed to fit in a standard 30mm cutout, ensuring compatibility when installing in pre-existing machinery. Simple spring return mechanism is rugged and durable, high lifetime, less maintenance and replacement. Impact and corrosion resistant metal bezel and body ensures product continues to operate even after severe accidents. High performance, International standards & certifications (Marine ABS certification, IP66, Type 1, 2, 3, 3R, 4, 12 and 13).