Model D Rev C Pressure Reducing Regulator With Graphite/NBR Gaskets; Parts Kit A For 2B6-7S37-13400000C; 1" Size; Cf8m Body,Cast Iron Spring Chamber; S3 Trim: 316SST With Virgin Teflon (V-Tfe) Seat,Neoprene (Bc);Diaphragm; Npt Screwed; 30-80 PSIG Range Spring; Opt-4: Stabilizer (Recommended For Gaseous Service Only)