Model B2, Back Pressure Regulator; 1/4" Size, Cv=0.20; 316L Stainless Steel Body, 316L Stainless Steel Spring Chamber; 302 Stainless Steel With Tefzel Ring Diaphragm, TFE Seat, 316L Stainless Steel With PCTFE Seal, Port Configuration D; FNPT End Connection; 3-250 PSIG Range Spring; 0-300 PSIG (0-20.7 BARG) Inlet Gauge