Description The Tecnifibre Razor Code 17 1.25 is perfect for players who want strength and versatility from their tennis strings. Providing 32% more durability than the TF poly average, this control-oriented polyester is ideal for string breakers who need support for their powerful approach. For racquets weighing over 300g, the Tecnifibre Razor Code 17 1.25 is a durable, control-oriented option. Thermocore technology guarantees the greatest flexibility for polyester monofilaments to generate less fatigue. High-Module Polyester Compound provides a firm feel and extreme durability. Round section for versatility..