I just seen one in a store that is 120 volt and specs it can weld up to 1/4" thick....did review search online and found out it is a lincoln welder which is a good brand....now my RF build will be with a 250 gal PP tank which is 3/16" steel and 3/16" steel stock for everything....one review was a guy who welds and has done 1/2" thick steel with it with a good review on this welder....at the store I seen it in it was priced at 236.00, so a heads up on what should be a good welder for our builds here Thumbs Up ....