Our advantages are lower prices,dynamic sales team,specialized QC,strong factories,high quality products and services for indoor air quality, 600cmh ERVs , negative pressure ventilation , ventilation system heat recuperator ,negative pressure ventilation . All products are manufactured with advanced equipment and strict QC procedures in order to ensure high quality. Welcome customers new and old to contact us for business cooperation. The product will supply to all over the world, such as Europe, America, Australia,South Africa , Kenya ,Kuala Lumpur , Houston .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.