Introducing the Donaldson primary air filter, a reliable solution crafted to meet ISO 5011 standards for efficient filtration across a wide spectrum of heavy-duty engine applications. With a length of 12.01 inches, an inside diameter of 3.58 inches, and an outside diameter of 7.93 inches, this filter seamlessly integrates into various systems. The high-efficiency cellulose media forms the core of its exceptional performance, ensuring top-notch filtration in demanding environments. Additionally, the filter boasts corrosion-resistant, coated steel liners, offering vital support to the media, maximizing airflow for optimal operation. The innovative Pleatloc feature maintains uniform pleat spacing, preventing media from bunching, and ultimately extending the filter's service life.