All pneumatic motors require the use of an air filter, regulator, and lubricator to function. This part is Includedas part of the standard assembly on all Marco 750 CFM, 950 CFM, and 1600 CFM pneumatic aftercoolers and air dryers. Includes fittings to connect the air filter/regulator to the lubricator. See part numbers and schematics guide for a full list of parts included.