I will admit I was curious about the product you showed so I looked it up on eBay to see how much it was. One thing I noticed was that it never really said it was used for refilling propane, only liquified gas. There is a picture in the ad of some sort of blue bulk gas canister, but I can't read the writing on it because it's in Chinese. When I looked closer at the picture, I'm not even sure if it's even possible to connect this hose to a standard propane tank, at least not to the common type of propane valves that we use in the US. Are you sure this isnt a butane tank refiller that is meant for the overseas market?