This spool box contains 80 spools of fine quality Madeira Polyneon 40 weight thread in a handy carrying case. The case allows you to feed thread directly to the machine, and includes built-in thread cutters (safely recessed on the handle) and an adjustable nylon webbed shoulder strap. This 100% polyester thread is extremely strong and resists abrasion and breakage during high speed embroidery, and the colors will remain brilliant even after repeated exposure to sunlight, chlorine and washing. Great for stitching on sportswear, towels, linens, quilts and children's wear.