EXELAIR by Milton’s Simply Better Air® system provides the best solution to manage compressed air. Limited wall space? This (EX25PBL40A-02P) 1/4 NPT Mini Piggyback Air Filter & Regulator with Lubricator (FRL) trio pack saves space by combining features of the filter regulator & lubricator into one unit. Its polycarbonate bowl has a capacity of 1.4 oz. and an automatic drain or can be manually drained by rotating the shut-off at the bottom. Piggybacking onto the filter is the Regulator which includes 1 5/8” dial gauge readings in both PSI/Mpa as well as a lockout knob to set desired PSI. The Lubricator is attached to the piggyback unit and includes bowl with a capacity of 0.845 oz. The FRL lubricator delivers a consistent mist of oil through the airline and extends tool life which can be refilled either by removing bowl or filling through oil fill cap on top. Oil amount is easily adjusted by rotating the dial at the top of the unit. Max Airflow of 20 CFM and a max operating pressure 145 PSI. Always install FR 20' feet down line of air compressor to allow air to cool and lessen the amount of water carried through the supply line. Comes fully assembled. Includes mounting bracket and hardware. Replacement filter: Milton # (S-1144-1RP).