This is the Li-Ning string used by Yuta Watanabe. It's 0.67mm thick, balancing high repulsion and durability. It gives the impression of a high-repulsion feel with good bite. Bulk sales are also possible if you tell me how many you want. I'll discount the price slightly. - Brand: LI-NING - Model: L67 - Thickness: 0.67mm - Length: 10m / 33feet - Feeling: MEDIUM FEELING - Characteristics: HIGH REPULSION Thank you for looking. Li-Ning li-ning Japan National Team Rare Yuta Watanabe