These are 3 Sci-Fi panel modules. They were initially CAD models, therefore they're mid to high poly. They should be used for concept designs in 3D environments, but don't let that limit you. They come in fbx, obj and blend format.
OBJ (OBJ, filesize: 16.6 MB), BLEND (Blender, filesize: 7.38 MB), FBX (Autodesk FBX, filesize: 7.5 MB)