Gamma TNT2 16G Tennis String Improving on the popular TNT string, Gamma OCHO TNT is the top all around string for power, feel, and control. The second generation Thermal Nuclear Technology results in greater elasticity for more power and comfort from a solid core construction... Size - (See Description) | Color - (See Description) Authorized Gamma Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.