These are 3/4 medium gauge strings.

Pirastro says:

• rope core steel strings

• especially suited for arco and soloistic playing

• clear and focused sound

• big volume with great projection

• The core material is a high-tensile rope made from carbon steel which is wound with nickel.

• clear and focused sound

• especially suited for arco and soloistic playing

• very quick response

• big volume with great projection

• instantly playable and absolutely stable