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Wholesale High Precision 2mm 3mm 4mm 5mm 6mm Chrome Steel Bearing Ball 500PCS Per Bags. High Precision Manufacturing:Precision-ground bearing balls ensure smooth and stable rotation. High Hardness & Wear Resistance:Designed for long service life under continuous operation. Low Friction Performance:Smooth surface finish reduces friction and heat generation. Wide Material Selection:Available in chrome steel, stainless steel, and ceramic materials. Broad Industrial Applications:Suitable for bearings, valves, automotive systems, and precision equipment.