Grover 144BC4 Mini Bass Machines
Grover 144BC4 Mini Bass Machines, Machine Heads For Electric Bass, Compact, lightweight mini-size, Closed construction, Ratio: 20:1, Configuration: 4-in-Line, Bass Side (Left), Axle diameter without the mounting sleeve: 9 mm, Axle diameter with the mounting sleeve: 14 mm, Metal Y-buttons, Finish: Black Chrome