All parts distributed ABM 2400 tunomatic roller bridge for bigsby or other tremolo, with roller saddles. Fits Les Paul, ES335, Gretsch, etc. Adjustable post spacing from 2 7/8" - 3" with locking screws. 12" radius. 2 1/16" string spacing. German made, machined out of solid bell brass, heavier and more sustain than any stock bridge. People report better tone, and no rattle after replacing their stock bridges with this one. All parts #: GB 545. New old stock, never been used, still in original shrink wrap. New equivalent part through all parts is: GB-0545-010 and runs $105.