Tecnifibre Black Code 18 is a co-polyester tennis string designed for players seeking strong spin potential, controlled power, and a responsive hitting feel. Its five-sided profile features defined edges that help grip the ball for added spin, while Thermocore technology improves flexibility for a less rigid response than traditional firm polyester strings. The thin 18-gauge construction enhances ball feel and responsiveness, making it particularly appealing to aggressive players who prioritize spin and playability over maximum durability.
Intermediate to advanced players with fast, full swings who rely on topspin and prefer a thin, responsive polyester string with reliable control and a more forgiving feel.
| Gauge | 18 / 1.18 mm |
| Construction | Co-polyester Monofilament |
| Profile | Five-Sided (Pentagonal) |
| Technology | Thermocore |
| Length | 12 m / 39.4 ft |