The Marsh Bellorfram J8048 is a 3.5 inch standard air pressure gauge with a 1/4 inch NPT psi scale. This new product is designed for use in hydraulics, pneumatics, pumps, and plumbing applications. With a focus on accuracy and durability, this gauge is ideal for monitoring and measuring air pressure in a variety of industrial settings. The Marsh brand is known for producing reliable and high-quality instruments, making this gauge a valuable asset for businesses and professionals in the field.