Camping Gas Furnace Converter Device Long Gas Tank Gas Furnace Conversion Head Aluminum Alloy Gas Tank Cylinder Adapter Yellow Adapter Material: Copper+Aluminum Size: 4.3 x 2.7cm Weight: 42g MAPP Adapter Material: Copper+Aluminum Size: 3.5 x 3cm Weight:32g Usage: it is suitable for the furnace head (the one with pipe) to be directly screwed onto the gas connection port of the furnace head, then inserted into the long tank, and locked after 1 / 5 turn