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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.
For players with a strong and fast swing looking for high control. In addition, it maintains the tension and offersimproved durability.
For players with a strong and fast swing looking for high control. In addition, it maintains the tension and offersimproved durability.
