The 130en mig welder is a dual purpose welder that offers the advantages of standard mig welding but without the need for gas bottles although it can easily be converted to use conventional shielding gases it is supplied with a special flux coated wire that produces its own gas shroud as it burns this feature simplifys its use and makes it more suitable for outside use since there is less chance of any breeze blowing away the shrouding effect of the gas