... (TFO AND RING) Paper or Plastic Tube, 20S/2,3,4----80S/2,3,4 Heat Set Yarn, Air Knot, Semi-Dull ... Fiber and Bright Fiber, Raw White,Optical White,Bleach White 2. Poly/Poly (Poly/Cotton) Spun Core Sewing Thread and Dyed ... Core Yarn 20S/2,3--80S/2,3 3.100% Spun Polyester YarnVirgin&Recycled20/1-40/1-60/1-80/1 ...