100% sewing thread yarn, 20s/2,40s/2,42s/2,44s/2,50s/2,60s/3. RT and TFO, hight ... which produce the biggest factory which produce the 100% polyester sewing thread yarn in Liaoning province (HAICHENG CITY FEIHU TEXTILE ... , each day we produce about 40 ton 100% polyester sewing thread yarn. we have the yarn 20s/2, 40s/ ... /2, 50s/2,60s/3, there are RT and TFO (two for one ), raw white and optical white. ...