PR-06set | PR-06 set Nashville Style Bridge SetPR 06 titanium saddles are pre assembled with zinc die cast base. This bridge base is not Gibson's original parts. But it can be used as a replacement for the original Nashville Tune O Matic Bridge. Also you can use this bridge on some of other manufacturer's guitar which has a Tune O Matic Bridge. Please refer to the drawing, and check the size of your bridge. Chrome and Nickel plated bridge bases are also available, but the saddles are not plated.