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The Grover 409 Series Vintage A Style professional mandolin machine heads provide precision tuning for your instrument. Specially engineered adjustable open gears in modern worm under configuration and die-cast plates maintain gear alignment, enabling the finest tuning possible. The 18:1 gear ratio allows for precise tuning adjustments, bell-top button screw, and the 25/64" post hole and overall post length of 30.3 mm ensure a secure fit.

GROVER Professional Mandolin Vintage A Style 409 Series Pearloid Button Tuning Machines Chrome
GROVER Professional Mandolin Vintage A Style 409 Series Pearloid Button Tuning Machines Chrome

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