You should print the parts separately.
1. In the package:
Total 2 external spur gears(pinions): m1z9(3 pcs), m1z15(1pcs);
1 internal and external spur gear : m1z33z44(1pcs)
2. Explanation
m1z9 – that means the gear’s normal module is 1 and the number of tooth is 9. The rough diameter is 9~10mm;
m1z33z44 – the normal module is 1, quantity of internal teeth is 33 and number of external teeth is 44. The rough diameter is 44~46mm.
You can download the free STEP and DXF files :
https://www.twothreed.com/download/epicyclic-gear-set-m1z9z15z33z44/