Introducing the Donaldson primary air filter, meticulously designed to excel in heavy-duty engine applications. Its high-efficiency cellulose media ensures optimal performance across a broad spectrum of scenarios. The corrosion-resistant, coated steel liners provide robust support during operation, maximizing airflow for enhanced efficiency. With the innovative Pleatloc feature, uniform pleat spacing is guaranteed, preventing media from bunching and ultimately extending its service life. Measuring precisely at 19.13 inches in length, 5.16 inches in inside diameter, and 9.57 inches in outside diameter, this filter adheres to ISO 5011 standards.