Tecnifibre Black Code 4S is Tecnifibre's squared-shaped low-power co-poly designed to give players maximum spin potential. Utilizing a co-polyester core, this string possesses excellent durability with greatly enhanced tension maintenance and feel. Black Code 4S features a square profile, helpful for generating more spin as the string bites into the ball better. The string uses Tecnifibre's exclusive ThermoCore technology which serves two primary purposes. String-to-string friction is greatly reduced, enhancing durability and further promoting spin and ease of stringing. The ThermoCore technology also gives the string greater flexibility for more power and a softer feel. An excellent choice from all areas of the court with enhanced spin, good power, and a softer feel.

Construction: Extruded-shaped polyester monofilament

Color: Black

Gauge: 16G (1.30 mm) | 17G (1.25 mm) | 18G (1.20 mm)

Length: 40 ft (12.2 m)

For more information on strings, see our following blog posts:

Tecnifibre €™s new Polyester String: The Ice Code Cometh

10 Best Soft Co-Poly Strings to Try

Need help selecting a string? Check out our Choosing The Right Tennis String guide for more assistance.