Breather Vent, Air Inlet Size 1/2 in, Air Inlet Type BSP, Maximum Operating Pressure 150 psi, Minimum Operating Temperature 35 Degrees F, Maximum Operating Temperature 300 Degrees F, Filter Rating 40 micron, Air Outlet Size 1/2 in, Air Outlet Type BSP, Body Material Bronze, Material Filtered Oil, Minimum Flow Rate 0 scfm, Outside Diameter 7/8 in