Description The Luxilon ALU Power 18 strings are the most popular on the professional tour. These extremely durable strings resist movement to generate more power and optimum spin. If you want to play like the pros, then try the Luxilon ALU Power 18 and swing away! Durability: 7.5 Power: 10 Control: 9 Comfort: 9.5 Luxilon recommends lowering tension at least 10%..