3/8" NPT Air Filter & Regulator (FR) duo saves space by combining features of both the filter and regulator into one unit. Its polycarbonate bowl has a capacity of 7.4 oz. Contains a 3/8" push-to-connect drain tubing connection to channel content safely away during automatic draining, or can be manually drained by rotating the shut-off at the bottom. Next to the filter is the regulator, which includes 1 5/8” dial gauge readings in both PSI/Mpa and a lockout knob to set desired 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.