Aro-Flo Series Air Line Piggyback Filter/Regulator, 1/2 NPT Ports, 5 micron Element, 0-140 PSI PSI Spring Range, 172 SCFM Flow Rating

For planning around clearance, the overall size is listed as 2.78 inches wide by 9.96 inches high, and it is built as a compact filter and regulator in one body for space-limited installs.

It comes with 1/2 NPT ports.

That's what a piggyback unit does. It combines the filter and regulator into one compact body, so you're not stacking two separate components on the line. The 1/2 NPT ports match a standard half-inch pneumatic line, and the 5 micron element handles particulate filtration while the regulator side lets you dial in pressure anywhere from 0 to 140 PSI. Comes with a gauge already built in, so you can watch your output pressure without adding anything extra. Good fit for tight installs where a full two or three piece FRL combo just won't fit.