Check the listing for details. 16 Big Spools Sewing Thread Serger Polyester BLACK 2500 Yards Each Spool NEW. Color: Black, Condition: New. Listed at 29.89 USD. 16 Big spools (black) with each one 2500 yards, total 40000 yards. Can be used by hand or machine sewing.The sewing thread is made of high-quality 100% polyester, polyester is soft and smooth with high strength .it is not easy to be fraying or breaking, not discolor or shrink. Our thread won’t become hairy and won’t break easily for general sewing purpose.Multipurpose - This set of threads are ideal for knitting, hand sewing, machine sewing, cross stitch, teabag, crochet, embroidery, hand knitting, weaving etc. Best sewing machine coils for choice. Suitable for cotton, wool and synthetic fiber fabric.Perfect gift - This thread set are not only enough for your household use, also perfect to give your friends and family as a gift.