Meet the Donaldson safety air filter, your engine's reliable guardian. Designed to step in when the primary filter encounters damage or improper installation, this filter ensures uninterrupted operation. Its primary role is to shield the clean side of the air intake system from contaminants during primary filter servicing, maintaining optimal engine performance. What sets it apart is the rapid plugging feature, acting as an immediate alert system if contamination breaches the primary filter, allowing for swift action. This filter proudly meets ISO 5011 standards, ensuring quality and adherence to industry norms. With a length of 11.89 inches, inside diameter of 1.93 inches, and outside diameter of 2.52 inches, it's meticulously engineered for efficiency and reliability.