This trailer hub grease seal is a double lip seal with an inner diameter of 1.68" and an outer diameter of 3.37" with a thickness of 0.50". Grease seals are used to keep the water and road grime out and the grease in. This seal is most commonly used on 4200 pound capacity axles. This grease seal works on UFP and other marine axles.

Inner Diameter = 2.25"
Outer Diameter = 3.37"
Thickness = 0.50"