ITEM NAME:10PCS Rotary Caps Potentiometer Knobs With 10PCS Counting Dial 0 - 100 Scal R1C8 10PCS Rotary Caps Potentiometer Knobs With 10PCS Counting Dial 0 - 100 Scal R1C8 The knob is a manual elements with manual control. Can control the effect of a variety of functions, such as level, speed, voice, etc.Can be used for synthesizers, electric guitar,ect. Material: Plastic / Metal Color: Black / Silver Counting Dial range:0-100 Knob size:27 x 14mm Counting Dial size:41mm Aperture: 10mm For:6mm shaft Instructions:Place the counting dial under the knob and secure it with the nut. Package include: 10 x knobs 10 x Counting Dials Note: Light shooting 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..Counting Dial range:0-100. Counting Dial size:41mm. Instructions:Place the counting dial under the knob and secure it with the nut. 10 x Counting Dials. such as level, speed, voice, etc.Can be used for synthesizers, electric guitar,ect.