Introducing the Donaldson safety air filter, a reliable safeguard for your engine's air intake system. With precise measurements of 9.02 inches in length, 7.13 inches inside diameter, and 8.23 inches outside diameter, this filter strictly adheres to the esteemed ISO 5011 standards. Its primary function is to serve as a backup in case of primary filter damage or improper installation, providing an added layer of protection. Additionally, it diligently prevents contaminants from infiltrating the clean side of the air intake system during primary filter servicing. In the event of contamination breaching the primary filter, this safety filter is designed to plug rapidly, promptly alerting operators to take necessary action.