Flea’s current No. 1 is this Fender Custom Shop Jazz bass built by Jason Smith. It has an active Modulus Lane Poor pickup that was out of production, but due to demand from Flea and other bassists, is now available again. The current models on the market are called Legacy Lane Poor. It’s also outfitted with an Aguilar OBP-1 preamp. He keeps his knobs taped at his preferred settings (bass almost full up, treble rolled off) and only uses his volume knob live. It has a graphite neck that allows Robar to set Flea's action very low—4/64" on the bass side down to a 3/64" on the treble side—and Flea uses his signature set of GHS Boomers (.045–.105).