3D models from mrb files

I’m an undergrad student using Slicer to model soybean nodules. I’ve been segmenting the data and saving them as .mrb files. I’m able to generate a 3D preview, but have not been able to figure out how to generate a file that can be printed out of a 3D model.

Thank you all for any help!

This section of the Segmentations module documentation should help: https://slicer.readthedocs.io/en/latest/user_guide/modules/segmentations.html#export-segmentation-to-model-surface-mesh-file