Experience top-tier performance with the Donaldson primary air filter. Its high-efficiency cellulose media is engineered to excel across a broad spectrum of heavy-duty engine applications. Built with corrosion-resistant, coated steel liners, this filter provides robust support to the media, ensuring maximum airflow for optimized engine operation. The innovative Pleatloc feature ensures consistent pleat spacing, preventing media bunching and extending the filter's service life. With a length of 12 inches, inside diameter of 3.48 inches, and outside diameter of 6.09 inches, this filter adheres to ISO 5011 standards, assuring you of its quality and dependability.