Pirastro Passione Violin set: 

Passione is the gut string with increased tuning stability. The strings are handmade, finely wound and polished. They produce a powerful sound with a very easy response. Compared to traditional gut core strings, they have significantly increased tuning stability.

The set includes:

• E Silvery Steel: 26 gauge  (default is ball end, please specify if you prefer loop end at checkout)
• A Aluminum: 13 1/2 gauge
• D Silver: 13 1/2 gauge
• G-silver: 16 1/2 gauge

All A, D and G strings come with a ball end in order to facilitate the installation