Check the listing for details. Potentiometer Control Knob Insert Shaft Switch Knobs 6mm/Grey Blue / 10Pcs. Condition: New. Listed at 9.89 USD. About the product:The potentiometer knob refers to the twist knob installed on the potentiometer, which is mainly used for the volume. Widely used for D-type 6mm Diameter Shafts, Volume Control Knobs, Audio knobs, Guitar knobs, Electric Guitar Knobs, and so on.Good choice for you:The knob has a knurled design around it, which can increase friction when turning and is not easy to slip off.Specification:Material: PlasticShaft Hole Diameter: 6mm / 0.24"Size: 12 x 20 mm / 0.47 x 0.79" (D*H)In the package of: 10 Pack x Potentiometer Rotary KnobsEasy to install:You just need to insert the potentiometer directly. Fast and convenient installation fastening, smooth rotation, positive rotation.Tips:Please kindly note that the potentiometer is not included here.