theTool classical performance high tension

the Tool classical performance high tension 
High tension silver wound  basses  -   Carbon trebles  
Carbon trebles have a brighter sound than regular nylon trebles

 Carbon improve the intonation of the treble strings They are a little thinner than normal nylons and have a very powerful tone with great sustain.

Also available  with mix of high tension basses and medium tension trebles

Everything it's a matter of taste,  give a carbon set a try just to see the difference.