SIGNUM PRO SIGHYP130:SET Hyperion 1.30 Tennis String The Signum Pro Hyperion 1.30 Tennis String Offering an all new optimized molecular structure, Signum Pro Hyperion 1.30 brings the popular Poly Plasma string to an all new level. The co-polyester structure results in greater elasticity for enhanced comfort and power. Hyperion is designed for greater durability and directional control for hard hitters. The molecular structure of this string improves the tension maintenance for longer lasting playability. Signum suggests stringing Hyperion 10% lower than your normal string due to the t... Size - (See Description) | Color - (See Description) Authorized Signum Pro Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.