Feature: Product Introduction: the main parts are made of matte aluminum alloy, after heat treatment and hardness, the inner copper parts of the valve core are 59 copper, and the sealing ring is made of fluorine plastic. Function: to achieve a connection between the fuel tank and the fuel tank, so that the gas of one of the fuel tanks is fed into the other fuel tank, and the fuel tank is used more economically (universal flat fuel tank, other connectors need to buy other connectors)User manual: when connecting, screw one fuel tank to prevent air leakage, exports are at the top and imports are at the bottom; When removing the valve, please hold the valve by hand, it is best to be operated by two people. Please freeze the fuel tank ten minutes in advance so that it is easier to introduce gas. Description:Name: outdoor filling fuel tankMaterial: aluminum alloySpecifications: 2.6*6.4cmColor: silverPackage included:1pcs spare gas container AdapterNote:1. Please allow 1-3mm error due to manual measurement.2. The color may have different according to the real item due to the screen, pls understand.