Introducing the Donaldson primary air filter, meticulously engineered to excel in heavy-duty engine applications. Crafted with high-efficiency cellulose media, it ensures optimal performance across a diverse range of conditions. The filter's corrosion-resistant, coated steel liners provide vital support during operation, maximizing airflow efficiency. The innovative Pleatloc feature maintains uniform pleat spacing, preventing media bunching and promoting a longer service life. With precise measurements of 11 inches in length, 2.64 inches inside diameter, and 5.26 inches outside diameter, this filter meets ISO 5011 standards, ensuring a superior standard of quality.