Signum Pro’s  Blackline power  Tornado  takes Co-polyester strings to a new level  due to its new optimized molecular structure. Tornado is manufactured in an heptagonal shape which is then reheated and axially twisted.
Blackline  power  Tornado offers players exceptional spin and outstanding power in combination with excellent playability and comfort without sacrificing durability. Tornado maintains Signum Pro’s legendary reputation for producing strings with minimal tension loss and string movement.

Colour: Black
Diameter: 1.23mm
Length: 12 Metres