X ruler: 1 scale 0. 01mm，2 scale 0.01mm, 0.10mm, 4 scale 0.01mm, 0.10mm. 5 scale 1.5mm, 0.6mm, 0.15mm and 0.07mm. Div.x: 0.01mm. If item is defective after 3 months, you can still send it back to us.
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