The Donaldson safety air filter is your reliable backup in case of primary filter damage or installation mishaps. Its key feature is preventing contaminants from infiltrating the clean side of the air intake system during primary filter maintenance. Should any contamination breach the primary filter, this secondary filter is designed to swiftly plug, alerting operators to the issue. Certified to meet ISO 5011 standards, you can trust in its performance and quality. With a length of 13.75 inches, an inside diameter of 5.29 inches, and an outside diameter of 6.39 inches, this filter is tailored to provide essential protection and peace of mind.