Introducing the Donaldson primary air filter, a trusted solution for heavy-duty engine applications. Crafted with high-efficiency cellulose media, it excels in diverse operating conditions. The filter's corrosion-resistant, coated steel liners provide sturdy support to the media, ensuring maximum airflow efficiency. Thanks to the Pleatloc feature, the filter maintains uniform pleat spacing, preventing media from bunching and extending its service life. Standing at 9 inches in length, with an inside diameter of 2.64 inches and an outside diameter of 5.26 inches, this filter complies with ISO 5011 standards.