Gotoh GB640 4L CB Bass Tuners, Set of Machine Heads for Electric Bass, Configuration: Four left, Res-O-Lite Series, Super-light bass machine heads made of duralumin, Developed to prevent top-heaviness, Vintage specifications, Open design, Gear ratio: 1:28, Shaft length (to string hole): 20.4 mm, Bore: 17.6 mm, Mounting: Screws and press-in bushings, Colour: Cosmo Black, Includes fixing screws and press-in bushings, Made in Japan