This Harmony 9001SK, modular black push button has 2 positions and operates with a stay-put mechanism. It has a double insulated plastic bezel, has a round shape and 40mm mushroom head and 1 x NO + 1 x NC contacts. This 40mm mushroom shaped push button head is ideal for situations where quick actions are required for a process or machine to function correctly or where operator movements require maximum ergonomy. 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. Impact and corrosion resistant plastic body ensures product continues to operate even after severe accidents.