Now available in Red Tecnifibre XOne Biphase 17 Rouge provides more spin and power than its 16 gaug * e counterpart The ultimate in synthetic strings providing the closest playability to natural gut of * any synthetic string produced giving players maximum power feel and comfort Elastyl Fibers are used * giving 12 more power than the standard polyamide materials used in other synthetic strings XOne Bip * ase features a unique technology that separates it from other strings in the Tecnifibre line Fiber