Need to replace a missing knob? Fender has what you need straight from our U.S.-made instruments. Black plastic knob with white indicator line. Set screw mount. Designed to fit 1/4" solid shaft potentiometers. Upper knob for stacked control pot. Does not include mounting set screw or lower knob. Fits American Deluxe (US) and Deluxe Series (Mexico) Jazz Bass models.