The last born in the STRINGLAB house, it is a masterpiece of studies and tenacity, trials and tests (in the laboratory and in the field). Perfect mix of synergies that gave birth to the Al13 tour LB, born from the already consolidated Alu Tour, from which it inherited the tension hold, to which the control and spin have been improved, thanks to a mixture of resins added to the polyester already rich in metal ionomers. The result is power, spin and great control, created especially for the most trained arms of agonists and big hitters. Four gauges, 1.20mm and 1.25mm, a competitive 1.30mm with negligible tension loss and an aggressive 1.15mm which, combined with a larger diameter string, guarantees sensitivity and terrific spin!