Pirastro Obligato Viola set:

Obligato strings have a core made from a modern synthetic multifilament fibre. These strings sound warm and full, yet have a brilliant, rich overtone spectrum and focused tone. They have excellent playability and response throughout the entire dynamic range.

Set Includes:

• Obligato Viola A - steel/alum: Heavy, Removable Ball End
• Obligato Viola D - silver/synthetic: Heavy 
• Obligato Viola G - silver/synthetic: Heavy
• Obligato Viola C - tungsten-silver/synthetic: Heavy