Pirastro Perpetual cello strings were developed using ground-breaking construction and superior material composition to create strings with easy playability, long durability and perfect 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. At the same time, these cello strings present a tone that is focused and clear with the most delicate touches instantly audible and the base warmth always present.The Pirastro Perpetual Edition cello strings were created to provide players the most power-packed set in the series. The Perpetual Edition set offers a stronger and clear sound on the G and C strings while offering a full and round sounding A and D string.