WD 500K ohm Mini Thumbwheel Pot You can mount this pot underneath a floating pickguard and actuate a volume or tone control comfortably from a totally concealed position. Also be used in the soundhole of acoustic guitars, ukuleles and more. Outer dimension: 24.66 x 6.16mm - Solder Area: 16.27 x 13.29mm - Base: 12.35 x 3.93mm Part Number: WD500TW Available at Ant Hill Music!