This Schneider Electric Harmony 9001SK modular red push-button has 2 positions, operates with spring return mechanism. It has a round shape and is supplied with contact block, 57mm mushroom head and 1 x NO + 1 x NC contact. It fits in a 30mm hole. It has a plastic bezel. This 57mm 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. Plastic bezel. Ideal for applications requiring good resistance to chemical agents and/or double electrical insulation. 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 plastic 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, 4X, 12 and 13).