1、Premium aluminum alloy construction ensures durability. 2、The knob is designed for comfort and anti-slipping. 3、Compatible with most of any electric guitars. 4、Perfect gift for musical instrument lovers. 5、Characteristic and exquisite design with pleasant color. Features: Premium aluminum alloy construction ensures durability. The knob is designed for comfort and anti-slipping. Compatible with most of any electric guitars. Perfect gift for musical instrument lovers. Characteristic and exquisite design with pleasant color. Specification: Condition: 100%Brand New Material: Aluminum Alloy Size: Approx.1.8*1.8*1.8cm / 0.71*0.71*0.71in Color: Red Diameter of Inner Installation Hole: 5mm / 0.2in Package List: 3* Control Knobs Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store