The BG66UM has a 0.65mm thin gauge and the perfect balance of maximum speed, control and durability, making it the best choice for the world's top players. Yonex BG66 Ultimax is one of the top strings on the market, and instantly adds a noticeable improvement in repulsion as well as increased control - plus it sounds amazing. Near perfect string for the hard hitter or competitive player. 66UM provides 33% more durability that found in BG66.
Material: High-Intensity MULTIFILAMENTLength: 10m (33ft)Gauge: 0.65mmKey Properties: High Repulsion; Medium FeelingMade in Japan