Descriptions:1.Potentiometer Rotary Knob is useful for Straight Slide Potentiometer 2. Simple design and easy to useJust potentiometer knob, potentiometer is not included here.Features:Color: Silver BlackMaterial: ABSSize: 14*10.5*11(L*W*H)Fit for Shaft size: 4*1.6mm ( L*W） Package Content: 5Pcs x Potentiometer Flat push Knob.