Pirastro 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. Obligato viola strings have an ample amount of depth and warmth, with more clarity and projection than most strings designed to "warm up" a bright instrument.

Pirastro Obligato viola string composition:

A string: Aluminum over steel. removeable ball end

D string: Silver over synthetic

G string: Silver over synthetic

C string: Tungsten-silver over synthetic

In 4/4 size, medium gauge.