Our enterprise since its inception, usually regards product top quality as business life, repeatedly enhance manufacturing technology, make improvements to product excellent and continuously strengthen enterprise total high quality administration, in strict accordance with all the national standard ISO 9001:2000 for Non-Rebreathing Oxygen Mask, Round Tipped Catheter , Silicone Catheter Integrated Balloon , Reinforced Laryngeal Mask ,face mask . We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success. The product will supply to all over the world, such as Europe, America, Australia,Karachi, Seattle,The Swiss, Los Angeles.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.