100% polyester thread 36 Colors Bobbins Thread * 5 extra 20 white bobbin threads + 10 black bobbin threads total 210 PCS bobbin thread SizeA Class15 (SA156) prewound sewing Thread 36 Colors Sewing Bobbins Set: Total 210 PCS bobbin thread, 5 of each color, and extra 20 white bobbin threads 10 black bobbin threads for your sewing. fabric making Save time on thread changes for complex crafts that require frequent color changes such as dolls, clothing design, handicrafts, etc Premium Quality: Sewing threads are made of high quality 100 polyester fiber, strong and durable, not easy to lint and break, no fading and no shrinkage. Colorful sewing thread is soft and smooth, suitable for home DIY, professional tailoring, or emergency repair of clothes in different seasons. Standard Bobbins: Adopt standard Size A Class 15 (SA156) bobbins, pre-wound 40/2 polyester threads, such as Brother, Babylock, Janome, Singer, etc., adapting our bobbins to make your sewing process stable and smooth. Creative Non-Stop: A great sewing set for those who need a lot of bobbins for crafting, the abundant prewound bobbins can save your time, start the sewing process quickly without burr troubles, thread for sewing is a practical and good quality sewing set. Wide Application: It can be used for many sewing thread and embroidery projects, including sewing, repairs, all kinds of knitwear, silk, shirts, swimsuits, ties, raincoats, sportswear, gloves, curtain/pillow remodeling and so on. sewing thread can also be used for hand sewing crafts to make a special gift for your friends.