This Brass Filter has a sintered Bronze element that can handle up to 9000 psi. The Filter comes with six different, replaceable porosity elements and can be used for air, oil, and water. The available porosity ratings are 40, 30, 25, 20, 10 and 5 um. Connections are 1/4" male to 1/4" female NPT threads and 3/8" male to 3/8" female NPT and um threads.