Introducing the Donaldson primary air filter, meticulously designed for heavy-duty engine applications. Its high-efficiency cellulose media ensures top-notch performance, providing reliable filtration across a wide range of scenarios. Supported by corrosion-resistant, coated steel liners, this filter maximizes airflow, contributing to seamless engine operation. The innovative Pleatloc feature ensures uniform pleat spacing, preventing media bunching and significantly extending the filter's service life. With precise measurements of 2.34 inches in length, 3.00 inches inside diameter, and 4.39 inches outside diameter, this filter strictly adheres to the esteemed ISO 5011 standards.