Grover 305BC12 Rotomatics 12
Grover 305BC12 Mid-Size Rotomatics with Round Button - 12-String Guitar Machine Heads, 6 + 6 - Black Chrome, guitar machine heads, Mid-Size Rotomatics, closed gear, ratio: 18:1, 12 pieces: 6x left, 6x right, axis diameter without mounting sleeve: 6 mm, mounting sleeve diameter: 10 mm, Black Chrome Finish