Behind each string of the SPIRIT! string line for cello is the fundamental idea that making music should bring you joy. The amateur and the aspiring music enthusiast alike, both, will discover the right features in the Spirit Cello string line, giving you everything you need to produce a distinguished sound for every kind of music. Made of a steel core (A & D), rope core D & C) the new Spirit! cello strings have a vibrant, warm sound.