Milton s 1/4 NPT High-Pressure Regulator offers stable downstream air pressure over a wide range of air flows with accurate control fast response time and minimal pressure drop. Offset gauge ports can also serve as two 1/4 supply lines. The aluminum die cast body comes with a balanced piston and molded rubber seat. As a high-pressure regulator the 1/4 NPT High-Pressure Regulator has a maximum inlet pressure of 250 PSI and a regulated pressure range of 10-250 PSI.