Graph Tech Resomax NV2 Tune-o-matic 4mm Bridge with String Savers - Gold The PS-8843-G0 is Graph Tech's 4mm ResoMax NV2 tune-o-matic bridge in gold. This lightweight, high strength bridge will increase harmonic content and leave your guitar dripping with tone.  It comes preloaded with String Saver saddles to reduce string breakage and improve tuning stability. This is a great option to upgrade or replace the existing bridge on your Gibson USA, Gretsch or Godin electric guitar. The ResoMax Harmonic Bridge System is made from a lightweight alloy designed to have your guitar bursting with harmonics.  It's exclusive AutoLock feature secures the brides and tailpieces to your guitar, with or without strings magnetically with no tools to use or lose. All ResoMax bridges are triple plated for years of durability and good looks. The ResoMax tune-o-matic line of bridges feature an extended amount of saddle travel to make sure you have plenty of room to setup your guitar properly to ensure you and your guitar to perform at its best. Lightweight, high strength alloy AutoLock locks the bridge to the guitar without a tool. Triple plated finish. Increased harmonic content String Saver Saddles      Item  Post Spacing String Spacing  radius  Thread   4mm post 2 29/32"  2 1/16"  12" M5 x 0.8 4h  6mm post 2 29/32" 2 1/16" 12" M8 x 1.25 Tailpiece 3 1/4" NA 12" M8 x 1.25       View or download the installation instructions here View or download the Resomax FAQs here