continue on to further improve, to make sure product top quality in line with market and consumer standard requirements. Our firm has a excellent assurance program have already been established for Enal Tree Ester Guide Ring, Manufacturer Seal, China Oil Purifier and Oil Filtration, O Rings For Hydraulic Valves,sigle acting rod seal. Through more than 8 years of business, we have accumulated rich experience and advanced technologies in the production of our products. The product will supply to all over the world, such as Europe, America, Australia,Algeria, Guatemala,Algeria, Cape Town.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.