If you're a tennis player who breaks strings often

Includes hardware for easy installation

It serves a unique market of tennis players that are fairly consistent string-breakers

Don't move

monofilament premium polyester for extra durability

Solinco Hyper-G 17 1.20 COLLECTION-Type-String Savers If you're a tennis playerSolinco Hyper G 17 1. 20 tennis string is designed to offer excellent playability and control. Youll generate intense power and spin with the addition of great bite. This string uses a newly developed chemical formula in combination with high powered polyester monofilament fiber. Co Polyester string. Shaped to generate maximum power and control.