Product Name : Potentiometer Knob Cap; Material : Plastic, Aluminum; Net Weight : 95g Main Color : Silver Tone, Black; Shaft Hole Diameter : 6mm / 0.24inch; Top Diameter: 15mm / 0.6inch The potentiometer knob is suitable for connecting the rotary potentiometer, usually a multi-speed linear potentiometer which is always used as a volume control switch. Type A potentiometer volume switch, right and left knob. Replacement part for audio device, 6mm round shaft can be easily pressed. 360 degree knob for easy control of the potentiometer. Package Contents: 20 x Potentiometer Regulator Caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.