This 40 mm 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.