Introducing the Donaldson primary air filter, a product meticulously designed to meet ISO 5011 standards, offering reliability and efficiency. Crafted with high-efficiency cellulose media, it delivers optimal performance across a wide spectrum of heavy-duty engine applications. The filter is equipped with corrosion-resistant, coated steel liners that provide crucial support during operation, ensuring maximum airflow for optimal engine efficiency. The Pleatloc feature is instrumental in maintaining uniform pleat spacing, preventing media from bunching and ensuring a longer service life. Compliant with ISO 5011 standards, you can trust Donaldson to provide a primary air filter that meets industry benchmarks. With a length of 14 inches, an inside diameter of 9.48 inches, and an outside diameter of 13.84 inches, the Donaldson primary air filter is tailored for top-notch engine filtration.