1.100% Spun Polyester Sewing Thread 20/3/4-30/2-40/2-50/2-60/2 2. ... .100% Spun Polyester Sewing Thread and Dyed Yarn (TFO AND RING) 20/2,3,4----80S/2,3,4 and yarn 20/1--60/1--80/1 ... Paper or Plastic Tube, Heat Set Yarn, Air Knot, Semi-Dull Fiber and ... /Cotton) Spun Core Sewing Thread and Dyed Core Yarn 20S/2,3--80S/2,3 100% Spun Polyester Sewing Thread 20/2/3 R/W