Perpetual Violin Cadenza SetThe Pirastro Perpetual Cadenza violin string set is a complete set of strings designed for 4 4 violins. Its part of Pirastros Perpetual family but tailored for easier playability and a warm, expressive sound. Compared to standard Perpetual strings, the Cadenza set has reduced tension, which makes it comfortable to play especially for shifting and expressive passages. The set includes: E string: Steel (with removable ball end) A string: Aluminum wound