Save money. Cost little and save a lot of money by recharging. Lightweight: It weighs only 5g, so you can easily carry it when hiking and camping. Material: Copper Warning: Only fill your canister in a well-ventilated area, outdoors. Scope of delivery: 10 Gas Refill Adapters Product Usage: 1. Weigh the unused butane canister and write on the base with a marker. 2. Place the empty canister for about half an hour or overnight. 3. Take the canister out of the freezer and place the adapter on the canister. 4.Take your new full butane canister and insert it into the adaptor. 5. Press firmly on the bottom for 10-15 seconds and check the weight of the bottle each time until it equals the original weight indicated on the base. With this adapter, you You can refill your gas can as if you were using a cigarette lighter. You save a lot of money when you refill the product. Warning: Once you have filled the canister, it is always a good idea to check the canister seal to prevent leaks. Only fill your canister in a well-ventilated area, outdoors! Please Note: Without Gas Tank. Function: Material: Copper. Contents: Refill Adapters gas. Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the object actual received shall prevail.