The Thomastik Rondo Cello A & D Strings bring a gorgeously expressive dynamic range to your higher notes. Carbon-steel cores combine with multi-alloy windings to grant a fantastically broad and warm sound foundation across the range of these strings. The rapid and direct response will give you the confidence to play at your absolute best. Thomastiks Rondo range of strings has been designed specifically for advanced and sophisticated cellists. Manufactured to a discerning standard in Austria they deliver a highly expressive dynamic range with rich projection and a balanced overall tone. Youll find a particularly strong focus and tonal intensity with these strings resulting in a refined and mature character in the sound. Rondo strings are ideal for soloists and work particularly well on older vintage instruments. Specifications Strings for: Cello Strings: A and D Scale length: 4/4 Core: Carbon-steel Winding: Multi-alloy String end: Ball end