Model "D" SALES B KIT FOR PRODUCT CODE: 2C4-A367-1C000000C; Pressure Reducing Regulator,Tfe-Silicate Gaskets; 1/2" Size; 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;