Categories›Guitars›Graph Tech PRN 3422 N0 Ratio Acoustic Guitar Machine Heads Open Back with "Butter Bean"" button - 3 + 3 - Nickel"
Updated 15 May 2026
| Brand | Graph Tech |
| Category | Guitars |
| Available at | 1 UK stores |
| 90-day avg | £178.33 |
Graph Tech
Graph Tech PRN 3422 N0 Ratio Acoustic Guitar Machine Heads Open Back with "Butter Bean"" button - 3 + 3 - Nickel"
£158.00£163.00↓ 3% offGood Buy
Cheapest at Bax · 1 store
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PRICE HISTORY
Current
£148
Change
-4.3%
Avg
£151
Low
£138
High
£162
Volatility
3.9%
PRODUCT DESCRIPTION
- The Graph Tech PRN-3422-N0 are high-quality open-back tuning machines for a 6-string western guitar. The unique ratio system makes tuning faster and more precise, as each string has its own gear ratio. Thus, a half-turn of the knob changes exactly one semitone per string. The set includes 6 machine heads (3 left
- 3 right) with a stylish nickel finish and comfortable Butter Bean knobs. Perfect for replacement or upgrade of existing tuning machines.