A blend file of inner ear organ called cochlear duct (organ of corti). The parts are very detailed and labelled accurately in medical terminology. The materials are procedural and image textures based on non-overlapping UVs. Before buying watch the full video here :-https://youtu.be/i4RT68REP_Q. The formats 3mf, ply, obj, fbx, with applied uv mapped textures have also been included in the downloads along with stl.
https://www.fab.com/listings/3d49f342-ef79-468c-a966-92ec1fec8a96