MODEL "DA2" DIFFERENTIAL PRESSURE REDUCING REGULATOR (SERIES II)-PDRV; BODY SIZE 1/2",STANDARD DIAPHRAGM CONSTRUCTION; SALES KIT ; CF3M BODY,316L SST SPRING CHAMBER,1/4" BRASS PETCOCK VENT; SPECIAL TRIM MATERIALS; V-TFE STATIC SEALS,TFE U-CUP W/SST ENERGIZER DYNAMIC SEAL; PER CASHCO DRAWING NUMBER 51807 - W/ 316L SST PLUG/CAGE/PISTON, 3-PLY HALF HARD 302SST DIAPHRAGM, CTFE SEAT;RANGE SPG 10-35 PSID POSITIVE BIAS; OPT-55: SPECIAL CLEANING & PACKAGING FOR OXYGEN SERVICE PER SPEC #S-1134;