The gamma tnt2 touch 127mm tennis string set enables you to re string one racket to ensure excellent playability and power without sacrificing control the gamma tnt2 touch is a premium multifilament string that has been energised with the gamma patented tnt2 process to provide the player with a great combination of power control and shock reduction the string has a gauge of 17 127mm and is supplied as a 122m 40ft long set