There are only three xenon gas related parts available at the moment. The PB-ION Electric Propulsion System is an extremely efficient engine which consumes xenon and a lot of electric charge, and produces a minuscule amount of thrust (the half of one RCS thruster). However, it can run continuously for extremely long periods. The inline PB-X150 Xenon Container and the radially attached PB-X50R Xenon Container are tanks which can supply the engine with xenon, however additional means of generation and storage are necessary to supply electricity. One should remember to put bring either very large batteries and a slowly replenishing electricity source or a series of large solar panels to help power the xenon engines, in the event that your engines stop running and flame out, you should check your electricity supplies, this is usually the problem.