Used 8,845 SCFM Hydrogen Membrane Package. Includes (5) Used Hydrogen Membrane Vessels. Mfg Ventech Vessel Fabricators. Rated MAWP 501PSIG/FV@350F. Saddle Mounted. Serial numbers D8000-032-PK301-V1 through V5. National Board #57 through 61. Built 2015.