100pcs Plastic Grey Top Screw Tighten Control Knob 16mmDx16mmH 4mm Shaft

Specs:
. These are plastic control knobs with metal insert, top screw tighten type, fit 4 mm shaft Potentiometer
Dimensions:
. Diameter: 16 mm
. Height: 16 mm
. Hole Diameter: 4 mm
Color : grey
Package content：100 pcs plastic knob