MODEL "DA1" PRESSURE REDUCING REGULATOR (SERIES I) BODY SIZE 3",STANDARD DIAPHRAGM CONSTRUCTION; SALES KIT A; CF3M BODY, 316L SST SPRING CHAMBER; SPECIAL TRIM MATERIALS; PER SPQ NUMBER 55423 316 SST TRIM, PA SEAT, EPR DIAPHRAGM EPR STATIC SEAL, O-RING DYNAMIC SEAL;