Tecnifibre 4S 18G Black Tennis String

Tecnifibre 4S 18G 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: 18 (1.20mm)

Color: Black