1. These thread spool savers can hold the thread spool firmly to prevent the tails from unraveling and coming loose, and they help keep things organized and from getting messy.2. Thread Spools Saver, Width: 20mm / 0.79inch; Embroidery Thread, Thread Diameter: 0.1mm, Bottom Diameter: 55mm / 2.17inch, Height: 120mm / 4.72inch, Total Length: 3600m / 3937yards3. The embroidery threads are made of polyester. The elasticity and Tenacity of polyester reduce risks of breaking or fraying. The thread spool huggers are made of soft silicone, flexible and reusable. When removed from the thread bobbin these spool clamps always curl back to their original shape.4.
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