Polyester Ring Spun for sewing thread RW and Optical. Count : Ne20/1,24/1 ... ,30/1,40/1,50/1,60/1 and 2ply,3ply. Polyester Ring ... Spun for sewing thread RW and Optical.Count : Ne20/1,24 ... 50/1,60/1 and 2ply,3ply. Polyester sewing thread RW,Optical and ColorCount : 20/2 5000Y;20/3 ... 5000Y;60/3 5000Y etc. Polyester sewing thread