The X-One Biphase tennis string from Tecnifibre incorporates new technologies & a unique manufacturing process to create a high-level string for those seeking both control & power strokes. This multifilament string maintains excellent playing qualities & superior tensile strength thanks to the Biphase pre-stretching method. The three major components of this range are playability, integrity & durability, plus the utmost elasticity is provided with the Elastyl fibres. The string also offers enhanced accuracy, alongside better comfort & dynamic feel. On top of that, the X-One Biphase features a wear indicator which does inform when it’s time to replace the string with a fresh set. Shipped as a 200m (656ft) reel.