... 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, 80S) ... various lengths and strandsAnd our leading products "BAOFENG" brand spun polyester sewing thread are adequate yarn length .high strength .free of ...