Specification: Material: Copper Alloy + Plastic Color: Gold + Black Installation Type: Thread Application: Fit for all 1 LB propane bottles Features: -Well built, built heavier, bigger and safer.-Easy installation with flywheel holder for tightening. Fits all1 LB propane bottles and fills easily.-Automatically shuts off gas flow when pressurized (rubber ring allows for proper sealing).-Safest and easy to fill in seconds without a tool.-For maximum filling, place the cylinder tank in the freezer 30 minutes before filling. Usage:1. Close the valve to the grill propane tank.2. Insert the nose tip of the adapter into a 20 to 50 kg grill propane tank to fill the connections.3. Rotate the adapter handle clockwise to fit tightly.4. Screw the 1 lb propane tank clockwise into the cylinder.5. Turn the grill tank upside down, then open the grill tank valve.6. You will start to hear propane gas moving into the 1 lb.7 cylinder tank. The control valve in the adapter automatically shuts off the gas flow when a certain pressure is reached to avoid overfilling, so sit back and let it fill on its own.8. When there is no more sound coming from the tank, simply close the grill valve and remove the 1 lb propane tank tank. Packing List:1 x Tank Filling Adapter