Fishman Full Circle Upright Bass Pickup, UNC 1/4-20 Format Brand:FISHMAN Fishman is dedicated to helping musicians achieve the truest sound possible whenever they plug in. Plug in the Full Circle and the sound of your upright is all there. Whether its big, fat and punchy pizz, full-voiced Arco or slap, youll hear all the acoustic qualities, dynamics, and nuances of your bass - only louder.