Thank you for viewing! Industrial woolly nylon thread used in a sewing factory. * This is a set of 16 fine-wound spools. Ideal for overlock and cover stitch machines, and suitable for sewing knit and stretch materials. ◎ Highly elastic ■ Material: 100% nylon ■ Condition: Used (stored for a long period / approximately 10 years) * Due to long-term storage, there may be some wear and slight discoloration on the paper cores. Thank you for your consideration.