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The Grover Original “Milk Bottle” style Rotomatics (103 Series) tuning machines provide you with vintage-inspired performance and aesthetics. With an 18:1 gear ratio, these sealed tuning machines deliver precision tuning for your guitar so you can achieve perfect intonation. The pearloid buttons and chrome casing give your guitar a retro look while the drop-in design allows for an easy installation on most guitars with standard peghead holes. For guitarists seeking vintage tone and style, the (103 Series) tuning machines offer a lifetime of smooth, accurate performance, so you can focus on playing.