Model "DA5" SALES KIT FOR PRODUCT CODE: D55-AM97-5G6000M0E; Back Pressure Regulator (Series V)-BPV; Body Size 3/4",Standard Diaphragm Construction; Cf3m Body,316l SST Spring Chamber; Monel M Trim, V-Tfe Seat, Fk Diaphragm,;Fk Static Seal, SST/Tfe U-Cup Dynamic Seal; Opt-55: Cleaned For Oxygen Service Per Spec #S-1134