Tecnifibre Black Code is a pentagonal polyester string designed to have better elasticity, which delivers more pop, a bigger sweet spot and less shock at impact.

The pentagonal shape increases spin and feel. ThermoCore technology; an innovation in the polyester string process, allows the reduction of shock and vibrations linked with the use of hard strings.

Black Code is aimed at frequent string-breakers and can be used as the durability half of a hybrid.