A new bushing along with a new tremolo bar as a mating set that has been fitted and signed by Steve. The sleeve (A.K.A. "bushing" or "arm receptacle") is the gizmo that bolts to the bottom of the whammy assembly and sticks up through the top of the plate to accept the vibrato bar. This bushing was designed in the '50s to mate with the 'pop-in' Fender USA Vintage Jazzmaster Jaguar Tremolo Arm Bar. Both Arm 0054473049 and Sleeve 0054471049 are hand selected, fitted and signed. Brand New. Genuine Fender USA Parts.