Environmentally friendly and beneficial for your game. That's what the Luxilon Eco Rough tennis strings can do for you. Composed of 100% recycled materials, this string is dented in 45 degree angles, which increases the string's flexibility and provides a softer feel when hitting each shot. This is a great option for players looking for a durable string that complements additional spin placed on the ball. 100% recycled string composed of recycled PET bottles and packaging displays Diamond-shaped strings enhances spin potential by gripping the ball to increase RPMs without altering swing Dented surface delivers softer and more forgiving feel High durability due to a larger shape surface catching the ball upon contact Great for players looking to add maximum spin while also maintaining feel and control Flexibility of the string allows for arm-friendly playability Gauge:17 mm:1.25 Length Set: 40 ft / 12.2 m