Recommended draw weight: up to 20kg String dimensions are for [Ren-shin, Jiki-shin, Koku-shin] bows. Use the center serving by wrapping hemp or synthetic fiber over the base. Fire, sharp objects, and maten-nezumi (a type of rat) are prohibited. This product is a loop-type string. Adjust the height by twisting the string. Compared to other manufacturers, this product is relatively low-priced because it is only available as a finished product and has not undergone maintenance. Basically, no returns or exchanges are accepted. Archery equipment Kyudo (Japanese archery) Anonymous delivery