I have an airsep AS-E in working condition. Asking $4500 (MSRP $16k) may trade for a delta mag or herbie. Herbie 40mm would need 1k on top. This thing produces 91 LPM these are commonly used in hospitals and very large glass studios. Its the mother of all concentrators comes with tank runs from 45-65psi. Local pick up only! Text me at 717-808-7774 Click image for larger version.  Name: 20170721_153430.jpg  Views: 134  Size: 5.24 MB  ID: 90774Click image for larger version.  Name: 20170721_153416.jpg  Views: 117  Size: 3.95 MB  ID: 90775Click image for larger version.  Name: 20170721_153440.jpg  Views: 119  Size: 6.48 MB  ID: 90776