Precision Music Technologies V-Treb with 500KA CTS pot – Variable Treble Bleed Bypass Circuit. Made in USA. The V-Treb variable treble bleed/bypass circuit corrects the problem of high-frequency losses at reduced volumes by allowing the player to control how bright or warm the tone will get as the volume control is reduced. Pot: 24 mm body diameter, 1/4” knurled split shaft. Bushing diameter = 3/8”, Bushing Length = 3/4”. PCB dimentions: 1.06” x 0.46” x 0.07”