Introducing the Donaldson primary air filter, a testament to high-quality engineering and adherence to ISO 5011 standards. This filter boasts high-efficiency cellulose media, providing top-notch performance across a diverse spectrum of heavy-duty engine applications. Its corrosion-resistant, coated steel liners offer vital support during operation, ensuring maximum airflow for optimal engine efficiency. The Pleatloc feature sets this filter apart, ensuring uniform pleat spacing and preventing media bunching, thereby extending its service life. With a substantial length of 20 inches, an inside diameter of 6.72 inches, and an outside diameter of 11.09 inches, the Donaldson primary air filter is your trusted choice for maintaining engine performance.