For sale are three carbon fiber 4500psi HPA tanks in great condition. I treat these tanks very well as they should be. The hydro/re-hydro dates are shown in the last three photos. All work great! The black tank works great, but has a slow leak (would take about two weeks to empty the tank, very slow) that can be repaired with new or re-lubricated o-rings. Prices for these tanks are below: Black 90/4500 Ninja SLP Tank: $90 Grey 72/4500 HPA Tank: $85 Grey 90/4500 Ninja SLP Tank: $95 Redline Regulator and Line: $80 Thank you all for looking, if you have any questions feel free to contact me.