This cylinder adaptor from Western Enterprises facilitates a seamless connection between CGA-510 and CGA-520 fittings, making it an essential component for various welding applications. Designed with precision, it ensures compatibility and reliability in your welding setup. However, it's important to note that this product may expose users to lead, a substance recognized by the State of California as a potential risk for birth defects or reproductive harm. For further details, please refer to www.P65Warnings.ca.gov. Ideal for professionals and hobbyists alike, this adaptor enhances the versatility of your welding equipment.