SNECMA Atar 9K Mirage IV engine
You can find here the exhaust and last row of turbine blades for the french designed SNECMA Atar 9K engine.
This engine, a derivative of the one used on the Mirage III series, was only used on the Mirage IV strategic bomber/reconnaissance plane.
It then evolved into the 9K50, which would later equip the Mirage F1.
Today, SNECMA has been absorbed by the Safran Group and is now called Safran Aircraft Engines.
All the parts here are 1:72 scale, but can be rescaled to 1:48 (150%) or 1:32 (225%) for instance.
The exhaust nuzzle is very thin because it is designed for resin printers.