JET JFRL-12 1/2-Inch NPT Air Filter/REG/LUB Air filter and oiler feature shatterproof plastic bowls with protective metal cups The air filter removes solid particles and condensates moisture accompanying compressed air Micro-fog lubricator supplies lubricating oil to the pneumatic tool in proper proportion to the air consumption Air Pressure can be maintained by the steeples regulator accurately over a wide range of flows as necessary for each application