Musiclily Pro 4 In Line 21:1 Ratio Open Gear Electric Bass Tuners Machine Heads Tuning Keys Pegs for Precision Jazz Bass

- Fits electric bass, like JB PB style bass
- Bushing outer diameter: 18mm(45/64 inch)
- Gear ratio 21:1, open gear design
- Material: metal alloy, well finished, stable and long-lasting
- Package includes: 4pcs machine heads set (4R) and mounting accessories