This Harmony 9001SK, modular illuminated green push button with screw-in head operates with spring return mechanism. It has a double insulated plastic bezel and is supplied with 110V AC integral LED, it has 40mm mushroom head. This mushroom shaped push button with integral LED 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 installed into a standard 30mm diameter panel cut-outs and easily connected with control circuits. It is clearly distinguishable visually at a distance thanks to its illuminated head and a prominent 40mm mushroom shape. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP65, making it ideal for operation in harsh environments. Impact and corrosion resistant plastic body ensures product continues to operate even after severe accidents.