MODEL "2171" SALES B KIT FOR PRODUCT CODE: LC4-ASJ7-1A000000B; CRYOGENIC BACK PRESSURE RELIEF REGULATOR,TFE GASKETS 1/2" SIZE, ANGLE DESIGN (SIDE INLET(S) - BOTTOM OUTLET); 316L SST BODY & CF3M SST SPRING CHAMBER, OPT-55: CLEANED FOR OXYGEN SERVICE PER SPEC #S-1134; S36 TRIM: 316L SST WITH TFE SEAT,302SST DIAPHRAGM; 5-30 PSIG SST RANGE SPRING;