Nut slotted for classical Guitar. 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. The PQ-6225-00 is the perfect option to replace and upgrade the nut on your classical guitar. It is pre-slotted to make for a quick and easy install. Measure: Length: 52.83mm, Width: 5.97mm, Height: 9.45mm, E to E: 43.10mm. Colour: White