2+2 Sealed Bass Guitar Reeds Keys 2R 2L Head Machine Tuner for Precision Bass and Jazz Bass, BlackHeavy duty internal gear, economy closed bass tuning keys set for Precision bass or Jazz Bass.Fits 13.5mm pin holeColor: BlackA great replacement for old, broken tuning pins. A must-have bass accessory, perfect for you! Includes 4 pcs. (2R2L) bass tuners. Mounting screws, sleeves, and threaded sleeves are included. Replacement/spare parts for electric Jazz bass or precision instruments. Gear ratio – 1:22. They provide better tuning and greater stability. They are mainly made of durable hard zinc alloy material, and great for 4or5 strings bass tuning. These are high-quality sealed machine heads that are used to tune the bass, also a great replacement for damaged or old bass tuners! With heavy internal gear.. Smooth and glossy, wear-resistant, anti-rust and dustproof, fast and accurate tuning. The beautiful shape will make your bass more attractive, help you to be more confident in the bass show. Material: MetalPackage Contents:4 x Bass Tuning Pins (2R2L)4 x Fittings4 x Screws4 x WashersOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.