Donaldson's Duramax hydraulic filter comes with cellulose filter media and a 23-micron rating (Beta 1000). This spin-on filter, 3.70 inches in diameter and 8.58 inches long, ensures peak hydraulic system performance. The thread size is M24 x 1.5 while the gasket outside diameter is 2.76 inches with a 2.48 inch inside diameter.