Babolat RPM Blast (15-1.35mm) Tennis String Set The Babolat RPM Blast 15L offers the greatest durability while sacrificing some spin of the RPM line. This string shares the same basic construction and co-polyester composition as the popular Babolat Pro Hurricane Tour, with a few minor tweaks... Size - (See Description) | Color - (See Description) Authorized Babolat Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.