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.Suitable for ukulele.4.The exquisite craftsmanship makes it look exquisite and can perfectly decorate your ukulele and make it look more beautiful.5.Can help you tune quickly and accurately, perfectly replace old or damaged strings, and improve overall performance.6.It adopts strong and high-quality internal gears, which are and effectively prevent the screws from slipping, making the guitar strings less likely to loosen.7.Includes screws and nuts for easy installation.Specifications:Circumferential axis length: 27mmMaterial: Zinc AlloyColor: SilverBrand name: BQLZRSize: 42x33.6mm/1.65 inchx1.32 inch (LxW)Shaft length: 22.5mm/0.89 inchWeight: 133 gPackage include:4 x Ukulele Tuners Machine Heads6 x Mounting Screws4 x Nuts1 x Screwdriver