Musiclily A500k Guitar Switch Control Pot Potentiometer for Guitar Bass Parts, Chrome (Pack of 4) Music lily A500k Push Pull Split Knurled Long Shaft Audio Taper Guitar Switch Control Pot Potentiometer for Guitar Bass Parts, Chrome (Pack of 4);Fits Stratocaster and Les Paul 6MM knobs, should also fits other 6mm knobs as well. Ideal for electric guitar or bass building. ^Full Resistance:500k ohm; Audio Taper ^Shaft Length: 18mm; Shaft Diameter: 6mm ^Full Size; Whole Length: 43mm;Base Diameter: 16mm ^Package includes: 2 pcs A 500K Potentiometers