The Donaldson P550866 P783138 is a genuine Primary Radialseal air filter designed for heavy-duty applications, often superseding P783138. Featuring a high-quality cellulose media, it provides 99.9% filtration efficiency according to ISO 5011 standards. This robust filter has an outer diameter of 206.5 mm, an inner diameter of 105.4 mm, and a length of 339.6 mm, weighing 1.04 kg. It serves as a direct equivalent for Caterpillar 1393667 and John Deere AT175351, ensuring optimal engine protection and performance in a wide range of agricultural and construction equipment.