6mm Dia Knurled Shaft Potentiometer Volume Control Rotary Knobs Black Product Name : Potentiometer Knob Cap;Material : Plastic Color : Black;Shaft Hole Dia. : 6mm / 0.24" Overall Size : 30mm x 17mm / 1.2" x 0.7" (D*H) Weight : 9g Package Included : 1 x Potentiometer Knob