This 40mm mushroom shaped red 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.