The GB707 is part of GOTOH's regular series of bass tuning machines heads. GOTOH GB707 Bass Tuning Machines Compact modern style bass tuning machine Modern style plated tuning knob Rock-Solid post Lubri Plate gears 1:20 gear ratio Weight - 2.12oz (60.2grams) each Sold as a set of 4 in-line tuner... See More