Introducing the Donaldson safety air filter, a reliable safeguard for your engine. Designed to step in as a backup filter in case of primary filter damage or improper installation, it provides an added layer of protection. This filter takes its job seriously, preventing contaminants from infiltrating the clean side of the air intake system during primary filter servicing. Thanks to its ingenious design, it plugs rapidly if contamination manages to bypass the primary filter, alerting operators to a potential issue. We recommend replacing safety filters with every third primary filter change, unless a primary filter failure occurs. This ensures consistent and effective filtration. With ISO 5011 approval, you can trust that this filter meets the highest standards of quality and performance. Its dimensions of 13 inches in length, 3.82 inches inside diameter, and 5.07 inches outside diameter make it a precise fit for a range of applications.