String used by Rafael Nadal and other top players on tour. 8 sided co-polymer polyester adds extra bite on the ball. Excellent for big hitters looking for extra spin. Excellent string for topspin and spin.The item "Babolat RPM Blast 16 gauge 660 ft reel Black #1 Babolat poly string for topspin" is in sale since Wednesday, June 08, 2016. This item is in the category "Sporting Goods\Tennis & Racquet Sports\Tennis\Strings". The seller is "stevenmike2010" and is located in Miami, Florida. This item can be shipped worldwide.