Companion cube
grabcad
The Portal companion cube is available for 3D printing with IGS and STL files. The cube measures 60x60x60 mm, but can be scaled as desired. To print this model, use support material and set infill at 20% (approximate print time: 3h30m). Reducing scale to 70% lowers printing time to 1 hour. This design is based on in-game screenshots for accuracy; feel free to suggest improvements.
Download Model from grabcad
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