D'Addario Kaplan Cello Medium Tension String SetKaplan cello strings produce a rich and complex tone. Conceived for the most discerning musicians, they stand up well to extreme bow weight, allow a diverse tonal palette, and provide a powerful but warm sound. Aimed at the most discerning musician, its construction allows heavy bow pressure, without losing sound clarity while playing pianissimo. Instrument: Cello String Type: Set Size: 4 4 Gauge: Medium A String: Titanium wound over a steel core D