Precision Engineered for Demanding Environments Crafted from premium 304 stainless steel, these 3mm bearing balls undergo rigorous polishing and quality control to achieve unmatched roundness (±0.001mm tolerance). Their weak magnetic design makes them ideal for MRI machines, lab equipment, and electronics where magnetic interference must be minimized. With excellent resistance to rust, acids, and oxidation, they excel in medical, automotive, and industrial applications exposed to moisture or corrosive agents. Versatile & Reliable Performance Each pack contains 500 high-grade 3mm balls, compatible with miniature bearings, rotary joints, valves, and precision tools. Whether for repairing industrial machinery, upgrading automotive systems, or maintaining medical devices, these balls deliver consistent performance under stress. Package Includes:500 x 3mm stainless steel balls in a resealable anti-static bag +storage box