The knob 1818202 is a functional component designed for direct mounting on switches. With a shaft diameter of 10 x 10 millimeters, it allows for precise control through rotary handles. The knob is suitable for various models such as QSA250, QSA400, and QSA630, offering a switching angle of 90 degrees, which enables flexible application in different electrical installations. Its compact design, with a width, length, and diameter of 10 millimeters each, ensures easy integration into existing systems. The gray color group gives the product a neutral and timeless appearance that harmoniously fits into various environments. This knob is a practical solution for anyone seeking reliable and user-friendly control of their switching devices.