bridge for e-guitar, tune-o-matic, stud spacing 74,0mm, stud diam 6,5mm, gold Boston Musical Products is also known for its wide range of guitar parts for both electric and acoustic guitars, but also bass and other string instruments. With over 3,000 guitar parts, Boston is ideal to upgrade or repair your instrument, but also building your own instrument is a possibility. specifications bushing diameter: 12mm bushing length: 19,5mm thread studs: M8 spacing studs: 74,0mm string spacing E-e: 52mm diameter studhole: 6mm radius: 12&;quot; wire retainer: no saddles notched: yes finish: gold