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”