Pirastro Perpetual cello strings were developed using ground-breaking construction and superior material composition to create strings with easy playability, long durability and superior string-to-string harmony. The Perpetual cello strings open the instrument up to its full tonal palette and grants musicians the technical freedom to fully focus on their playing. Perpetual strings are characterized by flexibility and an extraordinary tonal spectrum, easily going from a sweet, warm tone to sheer endless power. At the same time, these cello strings offer a focused and clear response with the most delicate touches with warmth always present.