The Donaldson primary air filter is a testament to quality and efficiency in heavy-duty engine applications. Crafted with high-efficiency cellulose media, this filter excels across a wide spectrum of demanding conditions. Its corrosion-resistant, coated steel liners provide robust support to the media, ensuring optimal airflow and longevity. The innovative Pleatloc feature maintains uniform pleat spacing, preventing media bunching and extending the filter's service life. Measuring 15 inches in length, with an inside diameter of 4.84 inches and an outside diameter of 9.22 inches, this filter adheres to ISO 5011 standards, ensuring performance you can rely on.