Uxcell Potentiometer Control Knob (5 Piece) Product name : potentiometer control knob; knurled shaft insert diameter : 6Mm/15/64" Total size : 23 x 17Mm/0.6" x 0.7"(D*h); material : plastic, aluminium Color : Silver tone Weight : 27G Package included : 5 x potentiometer control knob