Pirastro Perpetual Cello StringsPerpetual strings are characterized by great flexibility and an extraordinary tonal spectrum: from a sweet, warm tone to sheer endless power everything is possible. The sound is like a large house with plenty of room for individual design. At the same time the tone is focused and clear, the most delicate touches are instantly audible and the base warmth always present. The natural qualities and timbre of each cello are enhanced by the strings great