Model D Rev C Pressure Reducing Regulator; Tfe-Silicate Gaskets; 1" Size; Sales Kit A; Cf8m Body & Spring Chamber (Opt-36): Cryogenic Construction;Opt-55: Cleaned For Oxygen Service Per Spec #S-1134; S36 Trim: 316SST With Virgin Teflon (V-Tfe) Seat,302SST Diaphragm; 30-80 PSIG SST Range Spring; Opt-4: Stabilizer (Recommended For Gaseous Service Only)