Signum Pro Tornado Set Tennis creating a true work of

creating a true work of art

this string helped unlock the spin and power of the modern tennis era

and tournament players craving effortless pace

the Ultra Pro 99 brings some added control and spin to the court

This durable string offers big hitters an outstanding blend of durability

Signum Pro Tornado Set Tennis creating a true work ofTornado is a heptagonal shaped co polyester string offering a high level of dynamic power while providing exceptional access to spin. This string is axially twisted and dramatically increases the spin potential compared to traditional round strings. Signum Pro Tornado also offers excellent playability and comfort for a co polyester string.