I have 2 of these for sale. One has been out of the package and isn't as shiny. They are both new old stock. The Western Adaptor 858 CGA 590 Industrial Air Cylinder to CGA 346 Air Regulator is specifically designed to connect an industrial air cylinder with CGA 590 fitting to a CGA 346 air regulator. This adaptor allows for a secure and efficient connection between the two components, ensuring proper functionality within welding and soldering equipment. As a product of Western, a reputable brand in the industry, users can trust in the quality and reliability of this adaptor for their MIG, TIG, and stick welding applications.