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POWER PRINCIPLE is a completely new. High-Copolymer, round, with a snap back as never before. The string has power, control at its best, supported by elastic additives.
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 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.
Ideal for Club- or Tournament-Players with a powerful groundstroke
Hexagonal shape and strong snap-back effect for great spin potential
High-Tech additives for excellent control, durability and tension stability
Our best-seller.
