Graph Tech PRB-4220-C0 Ratio Bass Machine Heads with Y-Style Button - 4-String, 2 + 2 - Chrome

- Graph Tech Ratio machine heads for bass
- closed construction
- each machine head has its own gear ratio, calibrated for the respective string
- one full rotation of any key results in one full tone pitch change (+ / -)
- ratio: E - 36:1, A - 30:1, D - 20:1, G - 18:1
- 4 pieces: 2x left, 2x right
- axis diameter without mounting sleeve: 8.9 mm (0.350)
- mounting diameter with mounting sleeve: 14.3 mm (0.563)
- weight ca. 52.62 g / 0.116 lbs (single)
- Y-Style Contemporary button
- chrome finish