The PQ-4025-00 is a 1/4" thick block or slab of pure TUSQ.  It is a 1/4" thick and can be used to make a nut, small saddle or just about any thing you can image.

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.