| Grover : 306C Classic Guitar Machines Grover 306C Classic Guitar Machines, machine heads for concert guitar / classical guitar, open, 6 pieces: 3x left, 3x right, 3-on-a-plate design, engraved plates, ratio: 14:1, shafts, shaft diameter: 10 mm, shaft distance: 35 mm, Butterfly pearloid buttons, chrome finish
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