Graph Tech PRB-5500-B0 Ratio Bass Machine Heads with Y-Style Button - 5-String, 5-in-Line, Bass Side (Left) - Black

- 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: B - 48:1, E - 36:1, A - 30:1, D - 20:1, G - 18:1
- 5 pieces: 5-in-Line, bass side (left)
- 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
- black finish