Introducing the Donaldson primary air filter, a reliable companion for heavy-duty engine applications. With a length of 10 inches, an inside diameter of 4.31 inches, and an outside diameter of 8.91 inches, this filter is equipped with high-efficiency cellulose media, delivering optimal performance while adhering to ISO 5011 standards. The corrosion-resistant, coated steel liners provide essential support to the media during operation, maximizing airflow for efficient engine function. Moreover, the Pleatloc feature ensures uniform pleat spacing, preventing media from bunching and ultimately promoting a longer service life.