Up for your consideration is a set of Lincoln Electric/Harris Cutwelder regulators. Included is a Harris 101-100C oxygen regulator with a CGA-540 bottle connection and a Harris 101-15C acetylene regulator with CGA-510 connection. These regulators have B size (9/16-18) hose connections. These regulators were used very little and are still in excellent condition and ready to go to work. I also have a Harris cutting torch set as well as many other cutting and welding torches, tools and equipment listed if you are interested.Please feel free to ask any questions you may have and thanks for looking!