Modular Filter, Regulator & Lubricator (Gauge Included), 3/8" NPTAssembly of all three individual components Components are attached in series using spacers and piping adapters, which make the individual components easily removable and mountable without disturbing the pipe line Comes complete with wall mounting bracket Regulators are used to maintain a steady outlet pressure, unaffected by variations or fluctuations in the inlet pressure Filter used to separate dust, dirt, moisture and other contaminants from