The Babolat RPM Blast (Revolutions Per Minute) is a monofilament string that offers a great combination of spin, power and a unique feel at impact. Because of the linked silicone coating it offers great spin potential. A perfect choice for the modern player who likes to take full cuts at the ball much like Rafael Nadal, Jo-Wilfried Tsonga and Sam Stosur. They all are already using the RPM Blast. 1.30mm for even better durability.