As for competitive charges, we believe that you will be searching far and wide for anything that can beat us. We will state with absolute certainty that for such excellent at such charges we have been the lowest around for Durable Filtration Systems, Carb Stone , Ch4 Gas Sensor , Gas Sniffer ,Sht15 Humidity Sensor . We welcome new and old clients from all walks of lifestyle to speak to us for potential organization relationships and mutual success! The product will supply to all over the world, such as Europe, America, Australia,Portugal , Suriname ,Liverpool , Birmingham .High output volume, top quality, timely delivery and your satisfaction are guaranteed. We welcome all inquiries and comments. We also offer agency service---that act as the agent in china for our customers. If you are interested in any of our products or have an OEM order to fulfill, please feel free to contact us now. Working with us will save you money and time.