This nickel-alloy heat exchanger is among several that were 3D printed for the Mars Oxygen In-situ Resource Utilization Experiment (MOXIE), one of the instruments aboard NASA's Perseverance Mars rover. If conventionally fabricated, the heat exchanger would have required making two parts and welding them together; the 3D-printed heat exchanger is a single piece.
NASA's Jet Propulsion Laboratory in Southern California built and will manage operations of the Mars 2020 Perseverance rover for NASA.
For more information about the mission, go to https://mars.nasa.gov/mars2020/.