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, ... 40/1,50/1,60/1 and 2ply,3ply. Polyester sewing thread RW,Optical and ColorCount : 20/2 5000Y;20 ... 60/2 5000Y;60/3 5000Y etc. Polyester sewing thread