Introducing the Donaldson primary air filter, a trusted solution for heavy-duty engine applications. Engineered with high-efficiency cellulose media, it excels in a wide range of demanding conditions. The filter features corrosion-resistant, coated steel liners that provide vital support to the media during operation, ensuring maximum airflow efficiency. The innovative Pleatloc feature ensures uniform pleat spacing, preventing media bunching and promoting an extended service life. With precise measurements of 6.65 inches in length, 2.76 inches in inside diameter, and 4.98 inches in outside diameter, this filter complies with ISO 5011 standards, embodying the trusted quality of the Donaldson brand.