DescriptionThe main parts of this product are matted aluminum alloy which is treated with heat for better hardness. The copper parts inside the core are made using 59 copper, and the sealing ring is made from fluorine plastic. It helps with realizing the connecting between one gas tank with another, so that the gas from one tank can be imported into the other, and thus the gas tank can be used more economically.Features-Color: Silver. -Material: Aluminum alloy. -Size: 2.7x2.5x2cm/ 1.06x0.98x0.78inches. -The main parts of this product are matted aluminum alloy which is treated with heat for better hardness. -The copper parts inside the core are made using 59 copper, and the sealing ring is made from fluorine plastic. -It helps with realizing the connecting between one gas tank with another, so that the gas from one tank can be imported into the other. -The gas tank can be used more economically with this inter-filling valve. -Outdoor cooking essential.