D/S,AIR FILTER, PRIMARY ROUNDSpecifications Item Description Introducing the Donaldson RadialSeal primary air filter, meticulously engineered to excel in heavy duty engine applications. This filter utilizes high efficiency cellulose media, ensuring top notch performance across a wide range of conditions. Its corrosion resistant, coated steel liners provide crucial support to the media during operation, maximizing airflow efficiency. The innovative Pleatloc feature ensures uniform