Black Aluminum Volume Wheel for standa split shaft knobs.< />Volume Wheel Knob fi for amplifier etc.< />Volume Knob is made of aluminum external and plastic inner.< />Dimension: 3 x 1.7cm (D*H)< />Size of the inner hole: 0.6cm< />Weight: 11.6g< />Package content: 1 x Amplifier Volume Control< />Note:Light ing and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.