Luxilon Alu Power 125 Tennis String Set - Black Now available in a limited edition black coating, ALU Power is the top string on tour for a reason - the aluminum present in the string enhances playability to go along with an impressive blend of power and control for advanced players. Its unique poly-ether-ether composition exceeds all quality standards for near-zero string variance. Completely impervious to atmospheric conditions such as moisture, ALU Power delivers unrivaled consistent performance for championship-worthy results. * Gauge17 * mm 1.25 * Length Set: 40 ft / 12.2 m * Top string on Pro Tour - used by roughly 60% of top 100 players * Superior power, control and spin potential * Contains Luxilon's unique poly-ether-ether material * Completely impervious to atmospheric conditions such as moisture