مجموعة الحرير الحيوي من ساك مكونة من 10 قطع بوزن 18 جم 7بوصة

In tennis, the strings are the part of a tennis racquet which make contact with the ball. The strings form a woven network inside the head (or "hoop") of the racquet. Strings have been made with a variety of materials and possess varying properties that have been measured, such as dynamic stiffness, tension retention, thickness (gauge), string texture (shape of the string), and rebound efficiency.The material used in tennis string can significantly affect a player's performance, and even health. Several materials are used to make tennis strings. They vary in terms of elasticity, durability, rebound efficiency, tension holding capability, and manufacturing cost, among other considerations.Virtually all modern racquets are strung in a criss-cross horizontal-vertical pattern. Various other patterns have been used in history with varying success.