1-50pcs 0.8-16mm Silicon Nitride Si3N4 Ceramic Bearing Balls G5 Diameter 1/1.2/1.5/1.588/2/2.381/2.5/2.778/3/3.175/3.5/4/4.5~1

1-50pcs 0.8-16mm Silicon Nitride Si3N4 Ceramic Bearing Balls G5 Diameter 1/1.2/1.5/1.588/2/2.381/2.5/2.778/3/3.175/3.5/4/4.5~1

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