Aluminium Potentiometer Knob Item no :3004 

Smilar item :3001 .3002.3003.3010.3030.
Material :ABS /ABS+BRASS

Color :gold, silver, black
Shaft hole :6.4mm/6mm with set-screw or 6*18T

aluminum knob is a kind of knob which widely using in audio market , and is basically made of a circular shape. It is mainly composed of an aluminum alloy that is not easy to rust. It has the advantages of being light and beautiful.

http://www.joystick-knob.com/