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OEM ODM 90mm Forged Steel Grinding Balls for Mining and Cement. Customized Sizes: Available in 20-150mm with custom sizes acceptable for specific needs. Low Breakage Rate: Breakage rate is below 1% ensuring durability in grinding applications. High Hardness: Hardness ranges from 60-65 HRC for superior wear resistance. OEM/ODM Services: Full customization, minor customization, and flexible customization available. ISO and SGS Certified: Products meet ISO9001 and SGS certification standards. Fast Lead Time: Peak and off-peak season lead time is within 15 working days. Factory Direct Sale: Direct from manufacturer with 15+ years of production experience.