Pirastro Passione is the gut string with increased stability. The sheep gut core of the Passione strings is manufactured, wound, and polished in the traditional way: by hand. Passione strings possess a fascinating diversity of sounds, which allows musicians to alter their tone as desired. The core sound is full, round, and warm and has a complex overtone spectrum causing brilliance and clarity and a great power of projection.

Pirastro Passione viola string composition:

A string- Aluminum over gut,  14 1/4 gauge

D string- Silver over gut,  14 gauge

G string- Silver over gut,  17 gauge

C string- Silver-Tungsten over gut,  20 gauge

In 4/4 size.