Set of 4 Bourns 500K SPLIT knurled shaft audio taper potentiometers with low friction rotation. This a short shaft pot (threaded bushing is 3/8" tall and 3/8" diameter, shaft is 1/4" diameter). Pot is manufactured by Bourns. A set of capactors and buss wire is included. Note: 1. Requires 3/8" diameter mounting hole 2. If you have an import guitar it uses metric sized components and these pots cannot be used without modifying the openings on your guitar. 3. These pots have coarse knurl shafts and require 6mm knobs.