50pc/ctn 100% POLYESTER SEWING THREAD LUBRICATED WITH SILICON have 20s/2,20s/3,20s/6,30s/2,30s/3,40s/2,40s/3,50s/2,50s/3,60s/2,80s/2,80s/3 and so on . Our factory always uses foreign raw materials 1.2D x 38mm staple fiber, for polyester sewing thread, which is imported from Thailand, Indonesia, and Korea. It is the best raw material for 100% spun polyester sewing threads (20S, 30S, 40S, 50S, 60S, ...