This emergency stop / shutdown button, also called EMS (Emergency Machine Stop) and EMO (Emergency Off), is easily installed into a standard 30mm diameter cut-outs It is clearly distinguishable visually at a distance thanks to a clear color and a prominent 40mm 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 High performance International standards & certifications (Marine ABS certification, IP66, Type 1, 2, 3, 3R, 4, 12 and 13)