This key operated selector switch provides a versatile interface for controlling your machines It is impact resistant, dust resistant, water resistant and vibration resistant, making it ideal for operation in harsh environments It is easily installed into a standard 30mm diameter panel cut-outs and provides a secure manner for authorized staff to switch between process or machine operating modes It weights 240.404g High performance International standards & certifications (Marine ABS certification, Type 1, 2, 3, 3R, 4, 6, 12 and 13)