This series is a 2 variable resistor with a shaft diameter of 0.2 inches (6 mm) and a diameter of 0.2 Please check the specifications (numerical value) as the image may have differences in shaft length. Variable resistors have a variety of relationships between the rotation angle of the axis and the change in resistance, usually the A-curve, B curve, and rare C curve are used. The A-curve is an exponent change and is ideal for audio volume control (volume adjustment). The B curve can be used to adjust the voltage of general equipment and other applications. The C curve reverses the direction of the rotation of the A curve to adjust the gain of the amplifier. Specifications: Resistance change characteristics: B, Resistance value: 50 kΩ, Resistance tolerance: ±20%, Rated power: 0.05 W, External dimension: 10 mm x 12 mm x 9 mm, Shaft (ΦD x L): 0.2 x 0.6 inches (6 x 15 mm), Axis: Groove, Mechanical rotation angle: Usage temperature range: Installation: Board mounting; Rotation plate: