Babolat Spiraltek 16 Tennis String Reel 200M/660ft For players who prefer synthetics and want a versatile all-court string, the answer is the new Babolat SG Spiraltek. Size - (16G) Color - (105 Black) Power Authorized Babolat Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.