Tecnifibre Pro Red Code 17G is one of the most well rounded polyesters on the market. The feel at contact is crisp, with easy access to spin and a surprising level of comfort. Pro Red Code is more comfortable than your average co-polyester string. Material: High Premium Copolymer- Polyester Color: Red Length: 40 feet / 12.2 m Gauge: 17g / 1.25 mm Benefits: - Higher level of performance (more power) - Higher level of tension resilience - Great comfort (limited shock over tension) For more information on strings, see our following blog posts: Tecnifibre s new Polyester String: The Ice Code Cometh String and Tension Tips from Tennis Express Stringing Experts Need help selecting a string? Check out our Choosing The Right Tennis String guide for more assistance.