Introducing the Donaldson primary air filter, meticulously crafted to meet the demands of heavy-duty engine applications. With high-efficiency cellulose media, it ensures top-tier performance across a broad spectrum of scenarios. The corrosion-resistant, coated steel liners provide robust support to the media, maximizing airflow efficiency. What sets this filter apart is the innovative Pleatloc feature, ensuring uniform pleat spacing and preventing media bunching, ultimately leading to an extended service life. Compliant with ISO 5011 standards, this filter stands as a testament to Donaldson's commitment to quality and reliability.