Brand:SJLLASER OEM ODM
Tolerance in Diameter::+/-0.001mm
Roundness:<0.4um
Out standing surface finish:S/D:20/10（Ra25nm）
Mini Order:300ball lens
Supply:1000000000ball lens
deliver goods:Within 15 days
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Ruby ball ,sapphire bsll is one of corundum gemstones. it is mainly characterized by wear resistance, high hardness, corrosion resistance and small friction coefficient. it is an idea material for precision bearing.
Tolerance in Diameter: +/-0.001mm Roundness<0.4um Surface finish：S/D:20/10（Ra25nm）