... and mutual benefit "is our principle .Your success is our business. 1.High quality;2.Competitive price;3.Promise the delivery time! 1 ... .Perfect expansion and specially designed built-in plug ensures full ... originYongnian, Handan ,Hebei province ,China(Mainland)MaterialCarbon SteelSurfacezinc yellow and zinc platedModel NumberM6, M8, M10, M12, M16, ...