Thank you for viewing. Core thread (eyelets/buttonholes) used for button areas of clothing, also for making small items. Kingspan sewing machine core thread 20/6 s 500m spool, 6 spools (2 colors) in a set. New, unused: The plastic wrapping was removed for photography. ◎ King Color No. 713: Gray系 (gray-based) 3 spools Color No. 723: Brown系 (brown-based) 3 spools 100% polyester Instant purchase OK Please consider after viewing the photos.