Donaldson's hydraulic filter is made with cellulose media and a 26-micron (Beta 1000) rating. The spin-on design, 3.66-inch diameter, 6.81-inch length, and 1 1/8-16 UN thread size, along with a gasket outside diameter of 2.8 inches and inside diameter of 2.01 inches, ensures reliable filtration for your hydraulic system.