5pcs Guitar Accessory Vintage Open Bass Guitar Tuning Keys Pegs Machine Heads Tu Type: Tuning PegThe ratio is 1:21. You can tune your bass precisely.The gear is bronze material plated with Chrome/Nickel.The chrome plating has passed 48 hours salty spray test. And you will not see any bubble on the surface.Absolutely the best choice for your beloved Bass Compatible with electric bassWith heavy duty internal gearMounting screws and ferrules are includedMaterial: zinc alloyColor: blackPackage Contents:5 * Guitar String Tuning(1 Left 4 Right)and Mounting AccessoriesOnly the above package content, other products are not included.Note: Light 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.