Features: 1. Connect and Disconnect Safely and Freely: With this adapter, you can connect and disconnect safely and freely without shutting down the whole system 2. Quick Connect: Allows quick connection of fittings, no tools required, easy to grip, install and connect 3. SAFE AND AIRTIGHT CONNECTION: Provided between propane hose or regulator and gas grill cylinder valve secure and airtight. login 4. CONVERSION OF POL VALVE TO QCC1 OR TYPE 1: The brass fitting easily converts the low pressure tank POL valve to fit any QCC1 or Type 1 hoses and regulators 5 . Solid Brass Material: The propane tank adapter is made of high quality solid brass, which is not easy to corrode and very durable. p> Material: Brass Usage: Convert LP TANK POL Propane Service Valve to QCC1 Type1 Color: Yellow How to use: 1. Close the grill's propane tank valve. 2. Insert the end of the adapter into the fill connector of the 20-50 ibs propane tank. 3. Turn the adapter counterclockwise for a snug fit. 4. Screw a 1lb CW propane cylinder into the adapter. 5. Turn the grill pot upside down and open the grill pot valve. 6. You start to hear propane gas going into the 1 ib cylinder. 7. The adapter's control valve automatically shuts off gas flow when it reaches a certain pressure to prevent overfilling, so please sit down and let it refill. 8. When there is no noise in the tank, simply close the grill valve and remove the 1 lb propane tank. Corrosion resistant and durable , very practical Solid Brass Material: The propane tank adapter is made of high quality solid brass , no tools required Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be some difference in color, depending on the physical object received Delivery Quantity: (according to the main picture)