Model "DA1" SALES KIT FOR PRODUCT CODE:D16-BSN7-1A1C00N0E; Pressure Reducing Regulator (Series I); Body Size 1",Standard Diaphragm Construction; Bronze Body & Spring Chamber; 316l SST Trim, V-Tfe Seat, Be-Cu Diaphragm,;SST/Tfe U-Cup Static Seal, SST/Tfe U-Cup Dynamic Seal; Opt-5: Or Opt-36: Cryogenic Construction; Opt-56: Special Cleaning Per Spec #S-1542