... -60/1 2.100% spun polyester yarn 20/1-60/1 3.poly/poly core spun sewing thread Dear Sirs,We are ... , 20S/2,3,4----80S/2,3,4 Heat Set Yarn, Air Knot, Semi-Dull Fiber and Bright Fiber, Raw White ... ,Bleach White 2. Poly/Poly (Poly/Cotton) Spun Core Sewing Thread and Dyed Core Yarn 20S/2,3--80S/2,3 3.100 ...