Yiwu Sanlong Sewing Thread Co. Ltd. is located in the lagest commodity city-Yiwu ,Zhejiang Province, integrating the research and development,production and sales as a whole.Well known in domestic and foreign trade markets, we are an experienced sewing thread production enterprise. Our company is specialized in producing all kinds of sewing thread,especially the 100% polyester and 100% cotton sewing thread.The size of products can be 20/2,20/3,20/4,20/6,20/9,30/2,30/3,40/2,40/3,50/2,50/3,60/3,60/4,80/2,80/3,150D/2,15OD/3,210D/3,210D/4,250D/3,500D/3 .....There are more than 1000 colors to your choice.And we have different quality to response flexiblly to various requirement. We have comprehensively introduced well-equipped testing facilities and strong technical equipment from abroad.Our technology professional boast strong scientific and technology strength.We have perfect management system,efficient