Coats Dual Duty Xtra Performance Thread is a Consistently strong, smooth thread for trouble free sewing. Use on all fibers, knits, and woven fabrics. Thread is 35wt and is available in a range of 302 Colors. 250 yards per spool, 3 spools per box, 240 spools per case. Machine needle size: 11-14, Hand Needle size: 7-8.