Grover 409NW Professional Mandolin N

Grover 409NW Professional Mandolin N, Set of Machine Heads for Mandolin, Configuration: Four left / four right, Buttons with same lengths for standard "A"-style mandolins, Open design, Worm thread above the gear, 4-On-A-Plate design, Gear ratio: 18:1, Installation diameter with mounting bushing: 8.30 mm, Shaft distance: 23 mm, Round, white plastic buttons, Finish: Nickel ...