Model D Rev C Pressure Reducing Regulator, Sales Kit B For Product Code: 2B4-3M67-12000000C; With Graphite/NBR Gaskets; 1/2" Size; Bronze Body & Spring Chamber; M36 Trim: Monel Trim With Virgin Teflon (V-Tfe) Seat,302 SST Diaphragm; Npt Screwed; 10-40 PSIG Range Spring