Luxilon Eco Rough 125 17g Reel 660' - SilverLuxilon Eco Rough 125 17g Reel 660' Silver 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.