GAMMA GRXLW:SET RZR Rx 17G/Live Wire 16G Hybrid Tennis String Black/Natural The Gamma RZR Rx 16G is constructed with a Thermoplastic Elastomer (TPE) material that is engineered to stretch more on impact for enhanced comfort and control. Thanks to a unique oval shape, the string bed is more aerodynamic, generating greater racquet-head speed... Size - (See Description) | Color - (See Description) Authorized Gamma Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.