Introducing the Donaldson RadialSeal safety air filter, meticulously designed to adhere to ISO 5011 standards. This filter serves as a reliable backup, ready to step in if the primary filter falters due to damage or improper installation. Its primary function? To act as an impenetrable barrier, ensuring no contaminants make their way into the clean side of your air intake system while the primary filter undergoes servicing. What sets this filter apart is its rapid plugging mechanism. Should any contamination manage to bypass the primary filter, our alert system kicks in, promptly notifying operators of the issue. With a length of 21.33 inches, an inside diameter of 5.24 inches, and an outside diameter of 6.89 inches, this filter is your first line of defense.