Musiclily Metric Size Plastic Speed Control Knobs Volume for Gibson Les Paul Electric Guitar Parts,Black(Pack of 20) Metric Size, ideal for Asia made(China, Korea, Japan) 6mm diameter shaft import pots.Not for inch size pots like Fender, CTS, Dimazio pots. Material: Plastic: Color: Black Top of the knob: approx. 24.5mm diameter;Bottom of the knob: approx. 26mm diameter;Height: approx. 13mm high;Hole for pots shaft: about 6mm diameter Metric Size is popular in guitars bass made outside the USA/Mexico. Package includes: 20 pcs control knobs