Features:Condition: New tank filling adapter. Fills 1 lb. Bottles in 1 minute or less as fast. It works with all 20, 30 or 40 pound 50, cylinders. Connect the smaller cylinder with this adapter and equalize the pressure between the two tanks. With this adapter, you are not able to pour the smaller bottles that it will only put in the tank as much as it can hold, you can also refill the larger tank if you find yourself in a situation where your larger tank dries out. Compare with others, ours has a safety feature. When the flow capacity is too high, ours will automatically close at the end. This feature controls the propane transfer capacity and ensures that the tank never overflows. This protects you from dangerously filling the tank when there are none. Includes: Material: Metal Color: As Pictures Show Package Content: 1 x Gas Adapter