Introducing the Donaldson primary air filter, meticulously engineered to enhance the performance of heavy-duty engines. Crafted with high-efficiency cellulose media, it excels across a broad spectrum of applications, ensuring optimal filtration. The filter features corrosion-resistant, coated steel liners that provide robust support to the media, maximizing airflow for seamless operation. The innovative Pleatloc feature ensures uniform pleat spacing, preventing any bunching of the media and thereby promoting an extended service life. With a length of 3.62 inches, an inside diameter of 6.87 inches, and an outside diameter of 9.43 inches, this filter proudly adheres to the esteemed ISO 5011 standards.