Protected Vent, Thread Size 1/4 In., Height 1.19 in, Top Cap Dia. (In. ) 3/4 in, Base Square (In. ) 9/16 in, Overall Length (In. ) 1 3/16 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): []