3R with 9 Factories is the largest manufactuer of water treatment chemical--FERRIC CHLORIDE and FERROUS CHLORIDE in China, with around 400,000 tons capacity per year . pls contact TRACY, 3r@hz3r.com ，whatsapp/Wechat 008617169971681. http://www.hz3r.com,https://www.facebook.com/3rtracy