Being supported by an advanced and professional IT team, we could offer technical support on pre-sales & after-sales service for Dadmac For Poly Dadmac, Dicyandiamide, Retention Agent Polyamine, Cas No. 461-58-5,Coagulant Aid Anionic Polyacrylamide. We welcome new and previous customers from all walks of lifestyle to contact us for long run organization relationships and mutual achievements. The product will supply to all over the world, such as Europe, America, Australia,Sudan, Plymouth,Austria, Estonia.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 if you have any questions. We are glad to work for every client.