Herewith Kizuna Duratech D61 High quality badminton stringing review; Kizuna Duratech D61 high quality badminton string by ERR badminton restring Singapore. Kizuna D61 is simply introduced in 2019. This Kizuna D61 badminton string as you may see the gauge is thin only 0.61mm, but this string equipped to offer “tough” emotion. With this