Ready to Ship (US) | Guyker NKB-007 Potentiometer Knob Set Gold Bronze Diameter 6MM Packaging:1 PCS and third is a flat

and third is a flat booster

This set is listed for 4-string bass use

Top radius marked R320 for matched fretboard-style fitment

Let out your most professional and creative sound with this 6-string tune-o-matic guitar bridge

Nickel and Gold to match different guitar styles

Ready to Ship (US) | Guyker NKB-007 Potentiometer Knob Set Gold Bronze Diameter 6MM Packaging:1 PCS and third is a flatFeatures Bell Knob Solid Shaft 4. 2 mm set screw Total Diameter: 24. 92 mm Height: 14. 67 mm Inner diameter: 6mm See Details Description The Metal knob features a bell shape and has a surface that provides a good grip for easy adjustment. Available in Chrome, Bronze & Gold.