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The Prym bobbin ring is provided for the safe and orderly storage of sewing machine bobbins. The plum blue ring made of soft plastic can accommodate up to twenty bobbins and furthermore prevents the unwinding of the thread. Bobbins of all sizes find firm support in it, and it can be moulded to the desired shape by using a simple technique. You put it 15 to 20 seconds in boiling water and the two edges are formed to fit the diameter of the bobbin. By dipping it in cold water it regains its original hardness and remains in the moulded form.