Guyker Guitar Bass Tuners (4 for Left) 1:17 Ratio Headstock Sealed Tuning Key Pegs Machine Head Replacement Electric Jazz or Precision Instruments Black

Precision 17:1 gear ratio with sealed lubrication, cast housings and metal knobs. Common size 13.7mm (0.54 inch) headstock peg hole. Mounting hardware (screws, bushings and washers) included. Sealed bass tuning machines for electric bass, like jazz Ibanez style bass. Please check the parameter drawing in the attached pics before placing your order.