R.I.T.C. 755 is a king of long rubber developed and produced by Tianjin Rubber Industry Research Institute which has accumulated many years of experience. It has the despun property and the following characteristics: batting and lowering, strong toughness and drift return route, having the function of guarding against loop drive, If used together with 729, it will generate strong power to make the opponent feel puzzled. It has long been called magic idiozome and was once used by Ms.Deng Yaping, the world champion.