Introducing the Donaldson RadialSeal primary air filter, meticulously engineered for heavy-duty engine applications. Its high-efficiency cellulose media ensures optimal performance across a diverse range of conditions. The corrosion-resistant, coated steel liners provide vital support to the media during operation, maximizing airflow efficiency. The innovative Pleatloc feature ensures uniform pleat spacing, preventing media bunching and promoting an extended service life. This 18.00-inch filter, with an inside diameter of 9.47 inches and an outside diameter of 13.84 inches, adheres to the ISO 5011 standards. Trust in the Donaldson RadialSeal for reliable, consistent filtration.