The all new Signum Pro Hyperion offers a new optimized molecular structure offering outstanding power along with an incredible level of playability and comfort. Signum Pro Hyperion also holds tension remarkably well, offering a very high level of control and is among the most durable poly-based strings we have play tested to date. The unique diamond-black color looks great on nearly every racquet. Hyperion is part of the new Blackline power series from Signum Pro destined to deliver high dynamic power co-poly strings with exceptional tension maintenance. Length: 660 ft./200m Gauge: 16/1. 30mm Color: Diamond- black Construction: Co-Polyester Advantage: Exceptional Durability, Comfort And Minimal Tension Loss