Here is some more background on this thruster:

“It demonstrates that performance comparable to a conventional thruster can be obtained through 3D printing.”

3D printing involves building up an object in layers rather than conventionally cutting unwanted material from a solid block, meaning that much less material is needed to make a given item.

The combustion chamber for the 10 N hydrazine thruster was printed in platinum–rhodium alloy using a laser beam applied to a metal powder bed.

“The aim was to test this alternative manufacturing method as a way of reducing material costs,” says Laurent Pambaguian, overseeing the project on the ESA side.

“At the start we were by no means certain it could be done, or even whether the metal powder could be prepared to the appropriate quality.

We hope you like the video and can’t wait to see what will be printed next!

thanks to phys.org for the awesome info