Brand new 1/4" NPT air compressor compressed air regulator with gauge and wall mounting bracket. This regulator is universal and can be used on any compressor that needs a 1/4" regulator. This regulator is equipped with 4 ports, one of the ports is your main air inlet which is 1/4" female NPT, directly on the other side is your main air outlet which is also 1/4" female NPT, the other two sides both have 1/8" female NPT ports which are normally used for an air pressure gauge to see what pressure you are regulating, only one gauge is needed the other port that you dont use can be used for an extra air outlet or can be plugged with a plug which is included with the regulator. This regulator is directional and there is a arrow on the side showing which way the air needs to flow. This regulator can adjust your pressure from 7-140 PSI.