The PQ-8501-00 is a perfect upgrade or replacement set of saddles for your post 2000 Gibson Nashville tune-o-matic bridge.  It will also fit in a TonePros  TP6 bridge as well as any tune-o-matic bridge marked PW on the underside.

TUSQ delivers a rich tone, crystal clear bell like high end with big open lows and a significant increase in harmonic content and harmonic sustain.  Increase harmonics equals more richness and character in your tone.  Its the difference between a four piece choir and a twelve piece choir singing every time your play a note.