The ARO 127122-000 Valve Regulator Assembly is a high-quality product designed for use in compressed air treatment systems. Made in the United States by ARO, a reputable brand in the industry, this valve regulator assembly features a 1/4 inch port diameter and a maximum pressure rating of 250 psi. Ideal for use in various industrial applications, this new old stock (NOS) valve regulator assembly is a reliable and efficient component for maintaining proper air pressure levels in your system.