Pirastro Violin Passione Solo SetThis set comes with E Silvery Steel Ball or Loop end #0. 26, A Gut Aluminium #13. 5, D Gut Silver #13. 5, G Gut Silver #16. 5 Pirastro Passione strings are finely wound and polished, handmade gut strings. They have a powerful sound, with a very easy response. Suitable for professional and historical performances, they offer increased tuning stability versus traditional gut core strings