Great for backpacking,camping and hiking. Features:Solid aluminum alloy,copper and stainless steel for long time service. Practical and reusable to refill your tanks. Two using methods meets your different demands. Adjustable valves for easy control. If the gas can not be filled in the tank,you need to release the gas to exhaust pressure. Firstly close the refilling valve, then open the exhaust valve,the gas will be discharged from the exhaust hole to exhaust pressure. After discharging,close the exhaust valve and open the refilling valve to refill the gas tank. Portable size for convenient storage. Specification:Material: Aluminum alloy + Copper + Stainless steelSize: 4.5 * 2 * 3.7cm / 1.8 * 0.8 * 1.5 inWeight: approx. 105 g / 3.7 ozPackage List:1* Adapter