Musiclily Metric Size Plastic Bell Hat style Speed Volume Control Knobs for Gibson Les Paul Style Electric Guitar, Black (Pack of 20) Musiclily Metric Size Plastic Bell Hat style Speed Volume Control Knobs for Gibson Les Paul Style Electric Guitar, 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. Volume knob, Alu surface top, plastic body with number. Top Diameter: approx. 18mm; Bottom of knob: approx. 25.5mm in diameter Package includes: 20 pcs control knobs