5Pcs 6mm Dia Knurled Shaft Silver Tone Potentiometer Rotary Knobs Caps Product Name : Potentiometer Control Knob;Fit for Shaft Hole Dia. : 6mm / 0.24" Fit Shaft Type : Knurled;Total Size : 14 x 16mm / 0.55"x 0.63&ldquo;(D*H) Material : Plastic, Aluminium;Color : Silver Tone TotalWeight : 13g Package Included : 5 x Potentiometer Control Knobs