The Luxilon(R) ALU Power(R) Feel 18 Tennis String feature a textured surface and surface denting, providing maximum power, control and durability. Ultimate Performance Big Banger(R) Technology offers greater and longer playability Supreme power, control and durability Textured surface Surface denting increases flex for added power potential Key Specs Set: 12.2m / 40' Gauge: 18 / 1.20mm Color: Platinum Additional Details Luxilon