There are 2 products.
The Signum Pro Thunderstorm is a axially twisted, decagonal string that offers excellent spin and control. This durable string has minimal tension loss while offering a comfortable, control oriented feel. This thinner gauge also offers a great playability.
The Topspin Cyber Flash is a tennis string made of the most modern, optimized PETP. Tennis players get a precise feedback from the SoP system for the individual strokes, which makes the string pleasant to play. With fast strokes, the optimal energy transfer of the tennis string pays off, which not only gives you optimal control but also very good ball acceleration.
