Donaldson presents a safety air filter that goes above and beyond, serving as a fail-safe in case of primary filter damage or improper installation. It acts as a steadfast barrier, preventing contaminants from infiltrating the clean side of your air intake system during primary filter servicing. Engineered to rapidly indicate if contamination breaches the primary filter, it provides a crucial alert to operators. This filter meets ISO 5011 standards, ensuring top-notch quality and performance. With a length of 15.25 inches, an inside diameter of 3.65 inches, and an outside diameter of 4.09 inches, it's a vital component in safeguarding your engine's efficiency and longevity.