From Michael Bretti of Applied Ion Systems:

AIS-EPPT1 Pulsed Plasma Thruster

The AIS-EPPT1 Pulsed Plasma Thruster an experimental pulsed plasma thruster design aimed at low-cost, easy to manufacture, and simplified propulsion for Cubesats and PocketQubes. This system takes lessons learned from the original AIS-gPPT3-1C Integrated Propulsion Module and further expands its capabilities to attempt to increase fuel capacity, improve ignition, performance, and ultimately lower PPT cost and simplify manufacturing. The highly compact thruster is small enough for integration with PocketQubes, and can be implemented as a single thruster, cluster, or attitude control for Cubesats.

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— Applied Ion Systems (@Applied_Ion) January 24, 2020