I create lung vessels in 3d slicer now i want to save this 3d lung vessels because after i will change this 3d lung vessels into stl file for 3d printing

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3d vessels
3d vessels1863×943 244 KB

i create lung vessels in 3d slicer now i want to save this 3d lung vessels because after i will change this 3d lung vessels into stl file for 3d printing.
any body help me