HEAD Ultra Tour 17L is a monofilament copolymer/polyester mix string designed for durability with the benefit of a soft elastic feel. Perfect for power players, Head Ultra Tour 16L offers good spin, durability and control.
Gauge: 17L (1.27mm)
Length: 40 feet (12.2m)
Available Colors: Silver, Blue
 

材料：100％ 二代柔性聚酯，手感减少了僵硬度，提高了球线的力量，但依然不走线耐打。