... field of sewing thread .Item Nohigh tenacity polyester yarnCount20s/2,20s/3,20s/4,20s/6, 20s/8, ... 20s/9,30s/2,30s/3,40s/2,40s/3,50s/2,50s/3,60s/2,60s/3,50D/370D/3 ... ,100D/2,100D/3,210D/2,210D/3,250D/2 ... ,250D/3,300D/2 ... , 300D/3,420D/2,420D/3, ...