The Forney 87727 oxygen high pressure gauge is a replacement gauge for oxygen regulators. It features threads that are common to Forney, Victor, Harris, Smith and Marquette style regulators. It has solid brass threads and brass casings to provide extra long life. Forney Industries is one of Americas longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets.If you've got metal working questions, we've got answers. Were committed to your success regardless of location size or needs. This oxygen gauge has a range of 0-4,000 PSIG, has a 2" (50.8mm) face with a 1/4" (6.35mm) national pipe thread (NPT) mounting stem. Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.