The R16148-1A-1-B50K from SR Passives is a single-turn, 50K Ohm potentiometer with 125mW of power rating, bearing a ±20% tolerance, mounted on a 6mm cable shaft. It is typically used to adjust electrical signals or connections, like controlling the volume and tone of a music amplifier, as well as in devices such as light dimmers, motor speed applications, and more.