Detail 【seasonoun】 2pcs Gas Refill Adapter Outdoor Camping Stove Gas Cylinder Gas Tank Gas Burner .
Material: Copper Size: 17x8mm Weight: about 6g
How to use it Weighing unused full butane canister and write with felt-tip on the base. Place empty canister to be refilled in freezer for approx. half hour. Take canister from freezer and place adaptor onto the canister. Take your new full butane canister and insert into adaptor. Push canister firmly down about 10-15 seconds at a time, checking each time the weight of the canister.