Herewith Kizuna Duratech D61 High quality badminton stringing review; Kizuna Duratech D61 high quality badminton string by ERR badminton restring Singapore. Kizuna D61 is just introduced in 2019. This Kizuna D61 badminton string as you can begin to see the gauge is slender only 0.61mm, but this string in a position to offer “hard†sensa