Check the listing for details. Golden Age Roller Bridge, Gold. Condition: New. Listed at 79.68 USD. This is the only roller bridge that matches the 12" radius of the Nashville Tune-O-Matic. Low-friction brass roller saddles let the strings move freely and return to accurate pitch. We designed this bridge to work with Bigsby vibratos, in place of the Nashville Tune-o-matic. This is the only roller bridge that matches the 12" radius of the Nashville, so you maintain the string action you're used to. We gave it a low profile to keep the strings clear of the bridge body too, eliminating a frequent source of vibrato problems. Thumbwheel height-adjustment studs and knurled bushings are included. Specs: String spread: 2-1/16" Saddle radius: 12" Stud spacing: 2-29/32" Stud threads: M5 x .8 About bridge & tailpiece measurements: String spread is the distance between the centers of the outer strings on a bridge or tailpiece. Saddle radius determines the arc formed by all the individual saddle heights, and is similar to the measurement of a fretboard. Stud/post spacing is the distance between the centers of the mounting posts of a bridge or 'stop' tailpiece. Bridge is made of plated zinc, with brass rollers.