CTS 500K full size, short/split, knurled shaft, audio taper potentiometer. Aluminum bushing and shaft. 15% Tolerance. Each pot comes with nut, lock & dress washer. These are short-shaft pots (threaded bushing is 3/8" tall X 3/8" diameter), sized for USA-made guitars. The potentiometers are manufactured for TAOT by CTS. These pots are generally equivalent to the 500K pots distributed by Allparts as part # # EP 086 Note: This part is sized for USA-made guitars. If you purchase this for an import guitar, the openings will need to be enlarged to 3/8" diameter. Do not use short shaft pots if your guitar has a control plate. As a general rule Les Paul's made before 1977 will use short-shaft pots, but please double check before you order as returns are not excepted for this item.