10 PCS 6mm Shaft Insert Dia Black Plastic Potentiometer Knobs Caps Product Name : Potentiometer Control Knob;Knob Top Diameter : 23mm / 0.9" Knob Base Diameter : 27mm / 1.06";Shaft Insert Diameter : 6mm / 0.24" Knob Total Height : 10mm / 0.4";Material : Plastic, Metal Main Color : Black, Silver Tone;Net Weight : 83g Package Included : 10 x Potentiometer Control Knob