This Radnor brass pressure gauge is a reliable tool for measuring air pressure. With a 2 inch diameter and capable of measuring up to 400 PSI, it is suitable for a variety of applications. The gauge is made from high-quality brass and comes with a 1/4 inch NPT connection diameter. The brand Radnor is known for producing top-quality tools and equipment, ensuring that your investment is worth every penny. Whether you are a professional or a DIY enthusiast, this pressure gauge is a must-have in your tool collection.