This yellow 40mm mushroom shaped push button head is ideal when quick actions are required. It fits for a process or machine to function correctly or where operator movements require highest 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 40mm mushroom shape. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66. It makes it ideal for operation in harsh environments.