Gotoh GBR640 4L XN Bass Tuners; GBR640-XN-L4; Set of Tuners for Electric Bass; Res-O-Lite Series, Super lightweight Bass Machine Heads made out of Duralumin; designed to solve "neck dive" problems; Reverse Wind; 4 pieces; Configuration: 4 Left; Construction: Open Type; Gear Ratio: 1:28; Shaft Length (to string hole): 20,4 mm (0,8"); Bore: 17,6 mm (0,69"); Mount: Screw(S) & Press Fit Bushing; Included: Mounting Screws & Press Fit Bushings; Finish: X Nickel; Made in Japan