Protected Vent, Thread Size 3/8 In., Height 1.25 in, Top Cap Dia. (In. ) 1 in, Base Square (In. ) 11/16 in, Overall Length (In. ) 1 1/4 in, Aluminum, Provide a Labyrinth Air Path Restricting Direct Entry of Dirt and Moisture to Reservoir or Gearbox. This item has been restricted from sale in the following state (s): []