The Radnor 2.5" x 200 PSI, NPT Brass Pressure Gauge 64003439 (VV11A) is a high-quality pressure gauge designed for use with welding regulators. Specifically, it is compatible with oxygen and fuel gases that are non-corrosive to brass or bronze. This gauge is an essential accessory for welding equipment, providing accurate and reliable measurements of pressure levels to ensure optimal performance and safety during welding processes. With the trusted Radnor brand behind it, this pressure gauge is a dependable tool for various industrial applications.