As a leading brand in tennis strings, Tecnifibre offers a wide range of strings designed for players of all levels and needs. The Razor line is expanding with a brand-new string, the Razor Spin. Like the Razor Soft, it delivers both precision -thanks to the use of high-modulus co-polyester -and comfort -by adding polyurethane additives to suit the widest range of players. The RAZOR SPIN string also offers a highly sought-after benefit for controlling racket power: spin: it features a square cross-section that allows the string to "bite " into the ball even more! Main material: Co-polyester and PU additives - recommended tension between 22 and 25 kg - maximum tension: 32 kg Tecnifibre Razor Spin 17 Tennis String | Gray | Christy Sports