GENESIS-True Grit Tennis String Blue-() The Genesis True Grit Tennis String Blue has great power in a comfortable package. With plenty of spin potential, this string offers a combination of all the perks you need, without sacrificing your comfort... Great Spin | Axially Twisted Design | Tremendous Power Size - (See Description) | Color - (See Description) Authorized Genesis Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.