Features:These are plastic management knobs with plastic insert, match 1/4"(6mm) shaft potentiometers management knobs to be assembled to potentiometers for simpler rotation: PlasticPattern: Ribbed threaded knurledDimensions:Max External Diameter: 15mmTop Diameter: 11mmShaft Hole Diameter: 6mmHeight: 16mmQuantity: 10 Please note:Just potentiometer knobs, potentiometers aren't incorporated right here Package included:10 x Potentiometer Knob