Protected Vent, -, Thread Size 1/2 In., Dia. Hex Flats (In.) -, Height 1.31 in, Top Cap Dia. (In.) 1 1/4 in, Base Square (In.) 7/8 in, Overall Length (In.) 1 5/16 in, Max. Operating PSI -, PSI -, Max. Operating Temp. -, Vacuum (In. Hg) -, Aluminum, Provide a Labyrinth Air Path Restricting Direct Entry of Dirt and Moisture to Reservoir or Gearbox