Product Description : Increased POWER and FEELBenefits: High heat capacity creates the ultimate performance of power and feel. Playability similar to natural gut.Composition: NRG2 Micro filaments with polyurethane. The BIPHASE treatment extends string life by 20%. Biphase increases spin and performance.Length: 40ft. (12m)Color: Natural Fancy cover. Lost about 6 lbs right after stringing and before hitting any ball, and it kept getting looser. It reached 40-something or 52- and I had to change it ASAP because it wasn't very good. The feel wasn't very nice. It might work for you but it didn't work for us. It could be the frames that didn't like that string, but it might work for others. It just wasn't close to a hit for us.