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All the fastener threaded open nuts are now available for you to download. The available sizes are all 1.0 BlockUnits wide and spanning from 0.25 to 4.0 BlockUnits long. The STL files are available from this link.
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This is the official homepage of the STEMFIE Project – the 3D-printable and open-sourced educational construction toy you can download and make at home!
This toy is not suitable for children under three years due to the choking hazard!