PB-X50R Xenon Container
From Kerbal Space Program Wiki
The PB-X50R Xenon Container is a radially attachable Xenon Tank which was added in version 0.21 of KSP, along with other parts from the KSPX pack.
The PB-X50R Xenon Container is a radially attachable Xenon Tank which was added in version 0.21 of KSP, along with other parts from the KSPX pack.