Have you lost one of the knobs for your Fishman guitar preamp? I did, and so I made this replacement replica. I couldn't find any replacement knobs online, so I remodeled this one from scratch. It fits perfect. This knob fits the Aura® Spectrum DI Preamp by Fishman (MODEL NUMBER: PRO-AUR-SPC) If you like this please let me know, I would like to hear your tunes as a thank you message. Please share in comments.