Features:
These are plastic control knobs with plastic insert, fit 1/4"(6mm) shaft potentiometers.
Plastic control knobs to be assembled to potentiometers for easier rotation.
Material: Plastic
Pattern: Ribbed threaded knurled

Max External Diameter: 15mm
Top Diameter: 11mm
Shaft Hole Diameter: 6mm
Height: 15mm
Quantity: 20PCS (5 colors, 4PCS for each color)

Please note:
Just potentiometer knobs, potentiometers are not included here.

Package included:
20 x  Potentiometer Knobs