Thomastik Infeld THRO-400 cello string set 4/4Thomastik Infeld THRO 400 cello string set 4 4 Thomastik Infeld RONDO NO. RO400 have been tested by over 500 professional cellists worldwide on instruments of the famous old and new masters. The product offers lots of radiance, color, volume and projection, especially for new builds. The strings are very present and masculine with an intense depth of sound, meaning they are more likely to meet the demands of professionals and advanced players. For