Model B2, Back Pressure Regulator; 1/2" Size, Cv=0.05; 316L Stainless Steel Body, 316L Stainless Steel Spring Chamber; 302 SST W/Tefzel Ring Diaphragm, Kalrez Seat, 316l SST W/Pctfe Seal,;Port Configuration "A"; FNPT End Connection; 10-750 PSIG Range Spring; No Inlet Gauge