Introducing the Donaldson safety air filter, a reliable safeguard for your air intake system. Measuring at 15 inches in length, with an inside diameter of 5.28 inches and an outside diameter of 6.4 inches, this filter is engineered to exacting standards, meeting ISO 5011 specifications. It serves as a crucial backup in the event of primary filter damage or improper installation, ensuring uninterrupted operation. Additionally, this filter acts as a sentinel, swiftly alerting operators if any contamination bypasses the primary filter, providing timely warnings. Following best practices, we recommend replacing the safety filter every third primary filter change, unless a primary filter failure has occurred.