This 1" NPT midsize regulator is the relieving type, offering stable downstream air pressure over a wide range of air flows for accurate control, fast response and minimal pressure drop. Offset gauge ports can also serve as two 1/4" NPT supply lines. Made up of an aluminum die cast body, balanced piston and molded rubber set, this regulator should be proceeded by a filter to eliminate damage. Maximum of 250 PSI and 250 SCFM.