Tecnifibre 4S 17 is a co-polyester tennis string designed for aggressive players seeking strong spin potential and precise control. Its four-sided profile features defined edges that help grip the ball, making it easier to generate topspin and shape shots during fast-paced rallies. The 17-gauge construction provides a responsive feel and improved ball feedback, while the firm polyester response supports confident, full swings.
Intermediate to advanced players with fast swing speeds who rely on topspin, aggressive baseline play, and directional control. Particularly suited to players who prefer the bite of a shaped polyester string.
| Gauge | 17 / 1.25 mm |
| Construction | Co-polyester Monofilament |
| Profile | Four-Sided (Square) |
| Length | 12 m / 39.4 ft |