Check the listing for details. Pirastro Tonica 4/4 Violin Strings Set E string With Ball 4/4 Medium. Condition: New. Listed at 40.64 USD. Pirastro Tonica 4/4 Violin Strings Set E string With Ball 4/4 Medium Authorized dealer over 40 years USA - "Gary Ritter Strings Shop" - South Lyon, Mich. Shipping outside lower 48 states USA and HI. - AK. - PR. will be calculated. The special synthetic core is made of the finest and most flexible single filaments along with high quality winding materials These strings are constructed using the latest manufacturing techniques, including strict quality control Feature great dependability, full and powerful volume, lively sound with a high degree of modulation Tonica violin strings are the top of the line synthetic core string from Pirastro. The special synthetic core is made of the finest and most flexible single filaments along with high quality winding materials. These strings are constructed using the latest manufacturing techniques, including strict quality control. They feature great dependability, full and powerful volume, lively sound with a high degree of modulation, extremely quick response, and they tune immediately and are resistant to changes in humidity.