Product Name: Potentiometer Knob Cap; Material: plastic, aluminum; Net weight: 19g Main Color: Silver Tone, Black; Shaft hole diameter: 6mm / 0.24 inch; Top diameter: 15mm / 0.6 inch Potentiometer knob is suitable for connecting the rotary potentiometer, usually multi-speed linear potentiometer which is always used as a volume control switch. A-type potentiometer volume switch, right and left knob. Spare part for audio device, 6mm round shaft can be pressure on it easily. 360-degree knob for easy control of the potentiometer. Package Contents: 4 x potentiometer regulator caps Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.