Optimize fuel purity with Donaldson Twist&Drain Water Separator Fuel filter, SAE J1488 and J1985 approved. The Spin-On design, 3.66-inch diameter, and 9.92-inch length, equipped with 10-micron, 99% efficiency Composite media and 1-14 UN thread size, ensures reliable filtration for #1 or #2 Diesel, Kerosene, Biodiesel up to B20, and JP8.