IKN 4pcs A250K Push Pull Guitar Control Pot Potentiometer/Linear Potentiometer Short Shaft Fits Strat Style and Les Paul Style 6MM knobs,should also fits other 6mm knobs as well.Ideal for electric guitar or bass building A500K, Shaft Length: 15mm Shaft Diameter: 6mm Base Diameter: 16mm Full Size; Coarse knurled shaft fits most control knobs Package Included: 4 x Guitar Bass Pots