The Dill Air Controls 8500 Gauge Check Station offers a convenient and accurate way for users to check large bore and standard bore air gauges. With 0.5 percent accuracy, a liquid filled dial to prevent in-shop vibrations, and pre-drilled holes for easy bolting to a wall or table, the Gauge Check Station is ideal for any shop. A certificate of accuracy is included for ISO records. Made in the U.S.A.