RED CODE is the most versatile string in this range with a standard composition that guarantees resistance and performance. Tecnifibre is the leading brand in strings and offers a wide range of strings dedicated to all levels and requirements of players. This string has been designed : For the very good and demanding player looking for resistance and versatility For rackets over 300g Recommended for heavy string breakers Colour: red Main material: Co-polyester Recommended tension between 22 and 25 kg Maximum tension: 32 kgs Recommended for heavy string breakers (> 10 hours of play) String made in France. ?Thermocore: Guarantees the greatest flexibility for polyester monofilaments to generate less fatigue. Co-Polyester compound: Selection of polyester granules known for their specific flexibility. High quality material thanks to a mix of different polyesters. Section: Round for versatility. BEST SELLER The best for the price GAME RETURNS Firm feel with a long life. Pure signature polyester Played by J.Isner (USA player)