They've done it again.  Signum Pro, once again is the test winner for Germany's TENNIS Magazine.  This publication objectively rates string performance and tension loss against several leading and new string products.  The new Signum Pro Tornado received the highest marks and was named winner for 2009. Construction:  Heptagonal shaped poly-based string made with Signum Pro's Blackline power technology which is a new OPTIMIZED molecular structure.

Advantage: The newest generation of poly-based string offers EXCEPTIONAL tension maintenance.  The twist construction allows for exceptional spin.  Excellent ball control and high dynamic power.

Gauges: 16, 1.29mm; 17, 1.23mm; 17L 1.17mm
Length: 40'
Color: Black

Why we carry this string:Because this string is a rightful heir to the Poly Plasma throne.  Marked by incredible tension maintenance and outstanding spin potential.  The Tornado offers top performance in all categories.