Recommended draw weight: ~16kg String dimensions are for [Ren-shin, Jiki-shin, Koku-shin] bows. The raw string material is Flex's Dynagen. For the center serving, please wrap hemp or synthetic fiber over the base. Fire, sharp objects, and maten-nezumi (a type of mythical rat) are prohibited. This product is a loop-type string. Adjust the height by twisting the string. Compared to other makers, this product is only available as a finished product and has not undergone maintenance, so it is relatively low-priced. Basically, no returns or exchanges are accepted. Archery equipment Kyudo (Japanese archery) Anonymous delivery