Being supported by an advanced and professional IT team, we could offer technical support on pre-sales & after-sales service for portable straw tester, Metal Filter Element , Carbonation Stone Corny Keg , Temperature Sensor Module ,Sht Temperature Sensor . We welcome new and aged buyers from all walks of lifetime to make contact with us for potential small business associations and mutual success! The product will supply to all over the world, such as Europe, America, Australia,Canada , Cologne ,Moscow , Sierra Leone .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.