A (F)NPT Connections (In.): 1/4 , Body Material: Cast Iron , Connection Type: 1/4" NPT , Disc Material: Stainless Steel , Length: 4.625" , Max. Operating PSI: 250 , Max. Pressure: 250 psi , NPT Inlet: 1/4" , NPT Outlet: 1/4 , Outlet Size: 1/4" , Pressure Adjustment Range: 2 to 30 psi , Type: Interchangeable Pilot Spring