Get certain mesh points

I want to pick the outer shell points of a mesh to define P1, P2 and P3 points, shown in Figure. Is it possible to select certain points of a mesh? I have tried the bounding box component but it only gives the perfect outer shell. Since I want to measure the deviation I want to define a clear outer box like an offset of that (238.9 KB)

This would be one way of doing it. (241.4 KB)

Thank you for your reply. Actually I want to select very end points of the mesh to find the middle point.


Ok, try this. (242.5 KB)

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If I read your initial question again, maybe this is more what you had in mind?
Intersecting the mesh with a plane at different hights and finding the midpoint. (243.5 KB)

Thank you very much! It is very helpful :four_leaf_clover: