P551551 Donaldson Filter ElementOuter Diameter: 3.66 Inches (93 MM)Thread Size: 1-12 UNLength: 5.35 Inches (136 MM)Gasket OD: 2.81 Inches (71 MM)Gasket ID: 2.42 Inches (61 MM)Efficiency Beta 2: 7 MicronEfficiency Beta 1000: 23 MicroUse with P161131 Head