Feature:1. Connect And Disconnect Safely And Freely: You can connect and disconnect safely and freely without shutting down the entire system with this adapter2. Quick Connection: Realize quick connection of accessories, no tools required, easy to grasp, install and connect3. Safe And Airtight Connection: Providing a safe and airtight connection between the propane hose or regulator and the gas grill cylinder valve4. Convert POL Valve To QCC‑1 Or Type 1: Brass fittings work for converting the LP tank POL valve to fit all QCC‑1 or Type 1 hoses and regulators, very practical5. Solid Brass Material: Propane tank adapter is made of good quality solid brass material, not easy to corrosion and heavy dutyHow to Use:1. Close the valve of the BBQ propane tank.2. Insert the nose tip of the adapter into the 20 to 50 ibs propane tank filling connector.3. Rotate the adapter CCW to a tight fit.4. Screw the 1 pound cylinder propane tank CW into the adapter.5. Turn the BBQ tank upside down, and then open the BBQ tank valve.6. You will begin to hear the sound of propane gas entering the 1 ib cylinder.7. The regulating valve in the adapter will automatically cut off the gas flow when it reaches a certain pressure to avoid over filling, so please sit down and let it fill by itself.8. When there is&