This is a Smith shielding gas regulator. It is brand new in the box, comes with everything in the picture including the spool of Hobart solid core wire. I believe this is the 30 series regulator, everything is identical to the picture and the description on other web sites. This is brand new, and hasn't been used. It came with my Miller welder, and I am only going to use flux cored wire. The item number on the box is Smith 221037, so I believe it is the 30 series because of the last two numbers, and looks identical in other pictures and has all of the same numbers. On the gauges it reads from 0-4000 inlet pressure, and on the output it goes from 0-50 cfh. This gauge is for use with argon, or argon/co2 mix, but not just a straight co2 gas. I don't know a whole lot about this gauge but if you have any questions, I will try to awnser them to the best of my knowledge. $60 to your door, or $50 if you pick it up.