Bourns 500K Long Split knurled shaft audio taper potentiometer with low friction rotation. This a long shaft pot (threaded bushing is 3/4" tall and 3/8" diameter, shaft is 1/4" diameter). Pot is manufactured by Bourns. Note: 1. Requires 3/8" diameter mounting hole 2. If you have an import guitar it is probably using metric sized components and this pot cannot be used without modifying the openings on your guitar.