Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Size: 119x18x45.9mm/4.69inchx0.71inchx1.81inch (LxWxH); Plastic Column Shaft: 9.5mm/0.37inch (Dia); Gear Ratio: 1:18.4.Scope of application: For classical guitar string alignment replacement, and DIY replacement according to personal preferences.5.The high-quality 1:18 gear ratio gear knob is used to adjust more easily, rotate smoothly, and fix the strings for a long time, and it is not easy to slide the strings.6.Triple-type design, open knob, pitch, not out of tune, firmly installed, not loose.7.The knobs of the black large oval handle, gold-plated pattern, elegant and beautiful, can decorate your guitar well and make your guitar look more beautiful and fashionable.Specifications:Material: A3 Steel Plate Iron Strings Copper Gears PlasticColor: Black GoldBrand name: leopardSize: 119x18x45.9mm/4.69inchx0.71inchx1.81inch (LxWxH)Plastic Column Shaft: 9.5mm/0.37inch (DiaWeight: 77gPackage include:1 x Classical Guitar String Tuners 3 Left4 x Gold Screws