Introducing the Donaldson primary air filter, a testament to high-quality engineering and adherence to ISO 5011 standards. This filter features high-efficiency cellulose media, delivering outstanding performance across a wide spectrum of heavy-duty engine applications. Its corrosion-resistant, coated steel liners provide crucial support during operation, ensuring maximum airflow for optimal engine efficiency. The Pleatloc feature further enhances its longevity by ensuring uniform pleat spacing and preventing media from bunching. With a length of 15 inches, an inside diameter of 3.48 inches, and an outside diameter of 6.09 inches, the Donaldson primary air filter stands as a reliable choice for maintaining engine performance.