Donaldson brings you a high-quality primary air filter meticulously designed to meet ISO 5011 standards. Constructed with high-efficiency cellulose media, this filter excels across a wide array of heavy-duty engine applications. The corrosion-resistant, steel liners coated to perfection provide robust support during operation, ensuring maximum airflow. The ingenious Pleatloc feature ensures uniform pleat spacing, effectively preventing media bunching and thereby extending the service life.