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What design file formats and size limits do you accept for FDM printing?

Last updated on Mar 30, 2026

We accept .stl, .obj, .step and .stp files for FDM printing projects, with a maximum single file size limit of 500MB. Compressed ZIP or RAR files are not recommended for upload.


All design files must have no broken holes. Keep main wall thickness above 1.2 mm, and ensure the thinnest feature is at least 0.8 mm. Thinner structures will bring printing failure and post-processing risks.