Model PTR-1 Pressure Temperature Regulator W/Temp Probe & Unloader; Body Size 4",; Cf3m Body, 316l SST Loading Chamber,;SST Temperature Probe - Head & Thermal Element,;Cleaned For Oxygen Service Per Cashco Spec #S-1134; 17-4ph/Monel/17-4ph Trim, Pa Seat, Fk Diaphragm;Fk Static Seal, Tfe Cap W/Fk Energizer Dynamic Seal, Gftfe Wiper; 150 Lb Raised Face Flanges; Lower Spring 2-5 PSIG Range; Internal Sensing, Standard - Flow To Open Direction; With Unloader, 1/4" Size Npt, SST Body And Spring Chamber; S2 Trim, SST Metal Seat And Diaphragm, Spring Range 100 - 175 PSIG; Brass Filter, SST Tubing, SST Fitting; Temperature Probe Set Point -20 Degrees F.