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 reduce, 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. Also check out the line of Tour-inspired Tecnifibre racquets.

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.