Fishman FULL CIRCLE Upright Bass Pickup - UNC 5/16-18 FormatFishman PRO FCL 003 Full Circle Upright Bass Pickup UNC 5 16 18 Format is a quick retro fit on upright basses with height adjustment wheels. Plug in the Full Circle and the sound of your upright is all there. Whether it's big, fat and punchy pizz, full voiced arco or slap, you'll hear all the acoustic qualities, dynamics, and nuances of your bass only louder. To match the pickup to your instrument and playing style, a fine tuning feature lets you