144 COLORS FOR YOU comes with 4box each box 36colors of prewound bobbin with polyester thread,includes many color systems such as green, red, orange, brown and so on, each bobbin 42yards length,enough for sewing DIY and normal daily usage POLYESTER THREAD is widely used in cloth and textile industry because of its Good resistance to high temperature, low temperature, light and water, the prewound bobbin thread will be an ideal choice for clothes repair and fabric handicrafts PLASTIC STORAGE BOX will be a great help for you to storage these prewound bobbin thread, just put each thread with bobbin back to the bobbin shape groove, the bobbin specialized box will keep prewound bobbin clean and prevent each small spool easily tangled IDEAL GIFT for your family or friends who like sewing or DIY crafts, this prewound bobbin with thread will meet most of their needs of sewing and crafts, and after the polyester thread used up, you can wind new thread to the bobbin and use it again and again FEEL FREE to contact us if you meet any problem when purchasing the prewound bobbin thread set or during the usage,the plastic embroidery and sewing prewound bobbin thread set is 100% quality guaranteed, you can buy it with confidence