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| Feature | Standard Quality | Extra Quality | |--------|----------------|----------------| | Tolerance | ±0.1mm | ±0.01mm or better | | Material cert | Basic mill cert | Third-party test (SGS, BV, TÜV) | | Surface finish | Ra 3.2 | Ra 0.8 or mirror finish | | Packaging | Basic cardboard | Anti-static/vacuum/sealed industrial pack | | Traceability | Batch only | Individual serial number + QC video | If you are searching for this material or