RS PRO RS Pro Volume adjustment knob (knob) / Accessory for knob Shaft: 6mm, Diameter: 20mm

It is mounted on the potentiometer shaft so that the voltage of the circuit can be adjusted. Designed for circular splined potentiometer shafts, the push-on design allows quick assembly. For added durability, the inside of the knob is made of tough plastic, with a knurled aluminum outer shell for better grip. Aluminum is anodized for increased corrosion resistance and durability. Also, the black body has white index lines to easily locate the knobs. This product complies with the Restriction of Hazardous Substances ( RoHS ) requirements. This means that it contains only a small amount of harmful substances. Such potentiometer knobs are often found on audio devices that control volume and other types of equipment that require precise adjustments.