Sealey 120802032 Gas Conversion Kit, Dualmig Gas/Gasless Versatility.
For use with the Mightymig 150 to convert, allowing gas welding, just order a reel of regular wire. tips, a bottle of gas and a conversion kit.
The kit contains mini regulator plus gas connection hose for welders PMG110 to PMG155XT.
PMG100 cannot be converted to welding with gas.