MODEL "D" PRESSURE REDUCING REGULATOR,GRAPHITE/NBR GASKETS 1" SIZE; SALES KIT B; CAST IRON BODY & SPRING CHAMBER; S2 TRIM: 416SST METAL SEAT,302SST DIAPHRAGM; NPT SCREWED; 2-15 PSIG RANGE SPRING; PER SPQ/MA DRAWING NUMBER 32963 SPEC'L PER CARRIER DWG 17MA41-1792; W/THRD SEAL & 2 DIAPHRAGM GASKETS