Check the listing for details. 3/8" Compressor InLine Compressed Air Industrial Regulator Heavy Duty Large Body. Color: Silver, Condition: New, Made in Taiwan. Listed at 31.95 USD. High-quality 3/8" NPT air compressor compressed air regulator with wall mounting bracket. This heavy-duty regulator is universal and can be used in a variety of in-line applications for air pressure regulation. The inlet and outlet on this regulator are both 3/8" female NPT, it also features two 1/8" female NPT ports for pressure gauges. Only one gauge is needed, the other port that you don't use can be used for an extra air outlet or can be plugged with the included plug. This is a directional regulator with an arrow on the side showing which way the air needs to flow. With this regulator you can adjust your pressure from 7-150 PSI the max pressure of this regulator is 220 PSI.