Air Line Lubricators are designed to provide proportional delivery of lubricating oil over a wide range of air flows and are ideal for most general applications. Micro Fog has droplet size of less than 2 microns, has finer control and the oil will travel greater distances. Lubricator is externally adjustable with a transparent sight dome for 360? visibility. Maximum pressure: 150 PSI at 125? F with polycarbonate bowl.