The Donaldson P123828 is a high-efficiency inner air filter, also known as a safety air filter, engineered to provide critical engine protection from harmful contaminants. This genuine Donaldson filter ensures superior filtration, extending engine life and maintaining optimal performance in demanding agricultural and construction environments. With an outer diameter of 63.5 mm, an inner diameter of 50.8 mm, and a length of 298.45 mm, it offers a precise fit for various machines including John Deere 4044R, 4052R, 4066R, 5045E, 5055E, 5065E, and 5075E tractors.