The particularity of this range is that it has a wear indicator, which allows the player to change the string before it breaks completely. These strings are renowned and appreciated for their power, comfort and their strong capacity to maintain their qualities over time. Thanks to the assembly of several hundred microfilaments, impregnated in liquid polyurethane, Tecnifibre offers players the opportunity to gain in power and performance. Main material: Polyamide, polyurethane, silicone finish Recommended tension between 22 and 25 kg Maximum tension: 32 kgs Not recommended for heavy string breakers (< 10 hours of play). String made in France. ?PU 400: 400% elasticity for great comfort and dynamic performance. ? 1 central core: Specific construction with a larger diameter to provide durability and firmness. P.H.P stands for Polymer High Performance. This provides greater resistance to shocks and a good tension hold. Polyamide fibres (985): Guarantees elasticity and ball feel by combining with PU 400. They provide tolerance in case of off-centre hits. S.P.L final coating Anti-abrasion coating for more resistance. EFFECTIVE FIRST PRICE This string lasts up to 2 times longer than a lambda string.