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Spools ring is specifically designed for the people without arms. they are difficult to find the thread and cut the thread when sewing stuff.Spools ring can solve this problem.You can cut off the line if you put the spools ring on the bobbin. Thread can be stored in it.The ring is fit for the size of the bobbin. It can also be recycled.
Huangshan University
Huangshan City, Anhui Province, China
Huangshan University
Huangshan City, Anhui Province, China