Pirastro Evah Pirazzi cello C string, tungsten wound over a rope core. Medium (mittel) gauge. Catalog #332420. Envelope design may vary from what is pictured here., , Pirastro Evah Pirazzi strings have a core made from a modern synthetic multifilament fibre. They are very intensive and powerful, with outstanding playability and exceptional response at any dynamic level, making them excellent for Soloists. They yield a complex sound, rich with overtones based on a brilliant core sound, as well as enormous projection. Evah Pirazzi strings are one of the most popular of all strings at the Metzler Violin Shop, among professionals, students, and amateurs alike.