Model "D" SALES A KIT FOR PRODUCT CODE: 2D4-3M67-140000M0C; Pressure Reducing Regulator,Tfe Gaskets (Opt-45); 1/2" Size; Bronze Body & Spring Chamber; M36 Trim: Monel Trim With V-Tfe Seat, 302 SST Diaphragm; Opt-55: Cleaned For Oxygen Service Per Spec #S-11