How to it:1. You need a inflatable valve, a empty flat gas container, a cylinder, and a electronic scale. 2. Please make flat gas container connection valve is before gas charging. 3. the cylinder interface to the cylinder, unscrew the cylinder valve and check whether there is gas escaping. 4. Let the cylinder lie or upside , and to flat gas container, Put the connected flat gas container on the scale, open the cylinder knob, then you can see in the pipe. 5.After gas charging, please shut all the valves. This propane refill adapter is designed for your flat gas container from cylinder with it Safe and easy to control. with this adapter, refill your flat gas tank. the gas container is Not including ! Colour:As Shown Material:Metal Package Contents: 1 x metal tube 1 x Adapte Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.