Tecnifibre 4S 17G Black Tennis String
Tecnifibre 4S 17G features a square section for maximum spin (renamed in 2021 from Black Code 4S-same string, new name), 20% more power than Pro Red Code, same tension maintenance as Razor Code, 15% more durable than Black Code. Length: 40ft. (12.2m) Gauge: 17 (1.25mm) Color: Black
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