guyker bass tuners (2r + 2l) - 1:20 ratio open gear tuning key pegs machine head replacement for electric jazz guitar bass or precision instruments - gk530 chrome 2r + 2l chrome - ratio 1:20 is up for auction in Musical Instruments. The current bid is $2.00, 91% below the $23.39 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.