Features: Aluminum knobs are for sound equipments or rotary potentiometer for protection and easy control. PU interior is useful to avoid damage and for long time service. Polish making great decoration accessory for equipments. Specifications: Material: Aluminum Color: Black Size: 2x1.6cm/0.79x0.63 Inner Hole Diameter: 6mm/0.24 Quantity: 1 Pc Note: Please allow 0-1mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 1 x Potentiometer Knob