Genuine Fender 250K Pickup Pan Potentiometer electric guitars and bass The 250K pot is usually associated with most single-coil pickups. 3/8 inch potentiometer shaft with center detent. Solid Shaft designed. Used to blend middle and bridge pickups on Deluxe Series (Mexico) and American Deluxe Series (US) Basses manufactured from 1997-Present Item Number: 004-9441-000 Available At Ant Hill Music!