Well-run equipment, professional sales team, and better after-sales services; We are also a unified big family, everyone stick to the company value "unification, dedication, tolerance" for Sodium salt of polynaphthalene sulphonic acid, Glyoxylic Acid, N,N-Bis(2-Hydroxyethyl)-P-Phenylenediamine Sulphate, 523-21-7,2475-44-7. Our Lab now is "National Lab of diesel engine turbo technology " , and we own a professional R&D team and complete testing facility. The product will supply to all over the world, such as Europe, America, Australia,Macedonia, Muscat,Ethiopia, azerbaijan.We set a strict quality control system. We have return and exchange policy, and you can exchange within 7 days after receive the wigs if it is in new station and we service repairing free for our products. Please feel free to contact us for further information and we will offer you competitive price list then.