bridge compensated saddle only, for plain unwound G string, polished aluminum Genuine Bigsby parts - for pure Bigsby sound, feel and performance. Bigsby offers a wide selection of parts for players looking to restore or upgrade their vintage or contemporary instruments. Genuine Bigsby sand cast polished aluminum guitar bridge saddle. Stud spacing is 2-13/16&;quot; (72 mm) center to center and the string spacing is pre-slotted at 2&;quot; (51 mm) with a 12&;quot; radius. Compensated for a plain G string, this is a direct replacement for many Gretsch solid and hollow body guitars. Polished aluminum bridge base and saddle Saddle is compensated for unwound, plain G string String spacing is 2-3/64&;quot; (51 mm) Post spacing is 2-13/16&;quot; (72 mm)