May i introduce our company to you .Our company ---Shandong Shuangyan Chemical Co.Ltd,is a well--know manufacture of chemical products in China. We are professional in producing zinc oxide(99.7%99.5%99%98%97%95%90%80%78%75%72%70%60%50%),Antioxidant, light magnesium oxide, white carbon black(ultrafine silica activity and active wear high silica) ,antioxidant RD and F.T rubber active agent. CSII5 series polyethylene polypropylene fiber .Besides, we have many types of gum tube . and all kinds of chemical material. We always provide client with high quality and reasonable price products. And we have good reputation both in China and aboard. If you are interest in some of our products, pls. keep in touch! looking forward to cooperation with you!