... % spun polyester sewing thread 20/2-60/1 2.100% spun polyester yarn 20/1-60/1 3.poly/poly core spun sewing ... Thread (TFO AND RING) Paper or Plastic Tube, 20S/2,3,4----80S/2,3,4 Heat Set Yarn, Air Knot, Semi-Dull Fiber ... /Cotton) Spun Core Sewing Thread and Dyed Core Yarn 20S/2,3--80S/2,3 3.100% Spun Polyester YarnVirgin&Recycled20/1-40/1-60 ...