Dunlop Black Widow 17 is a spin-focused co-polyester tennis string designed for aggressive players who want precise control and a responsive feel. Its seven-sided profile helps grip the ball for increased topspin and slice, while its relatively flexible construction offers a more forgiving response than many firm polyester strings. The thinner 17-gauge diameter enhances ball feel and spin potential, with less durability than the thicker 16-gauge version.
Intermediate to advanced players with fast, full swings who generate their own power and rely on spin to control aggressive shots. Particularly suited for baseliners seeking a shaped polyester string with greater responsiveness and a less rigid feel.
| Material | Co-polyester |
| Construction | Seven-sided monofilament |
| Gauge | 17 / 1.26 mm |
| Profile | Heptagonal |