Introducing the Harris HP722 Two-stage Gas Pressure Regulator Gauge (HP722-125-000-D1). This gas lab regulator is designed to work with hydrogen, helium, argon, and nitrogen gases, making it versatile for a variety of welding and soldering applications. The unit type is a single unit, and you will receive one gas lab regulator per purchase. The brand of this product is Harris. This gas pressure regulator gauge is perfect for those in the CNC, Metalworking Manufacturing industries and is a great addition to any welding equipment and accessories collection. It ensures precise gas control, making it an efficient and reliable tool for any welding or soldering job. PLEASE NOTE: If you think an accessory should be with this item, and it is not pictured or not mentioned, it is NOT included. What you see in the pictures, is exactly what you will be receiving.