Grover 102-18BN Rotomatics
Grover 102-18BN Original Rotomatics with 18:1 Gear Ratio - Guitar Machine Heads, 3 + 3 - Black Nickel, guitar machine heads, closed gear, ratio: 18:1, 6 pieces: 3x left, 3x right, axis diameter without mounting sleeve: 6 mm, mounting sleeve diameter: 10 mm (0.391""), Black Nickel Finish