Material: Bearing Steel (Gcr15). Φ10mm - 20mm Bearing Steel Balls Spheres High Precision. 18mm 18.256mm 18.5mm 19mm 19.05mm 19.5mm 19.844mm 20mm. 10mm 10.319mm 10.5mm 11mm 11.113mm 11.5mm 11.906mm 12mm.
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