Features: Made of high quality material, durable and reusable. Sewing thread is made of polyester, soft and sturdy, good quality thread do not break easily for your crafts process. Abundant prewound bobbins save your for time and start your sewing process quickly, free from the trouble of fuzz, practical and good quality. Can be applied to home sewing and embroidery machine, a good sewing set for people who need a lot of thread bobbins for craft projects. Suitable for most standard household or commercial sewing machines. Specifications: Material: Plastic Total Diameter: Approx. 0.79inch(2cm) Hole Diameter: Approx. 0.24inch(0.6cm) Package Includes: 20x Prewound Bobbin Threads note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.