Performance: N52. 3mm x 1mm， 3mm x 2mm， 3mm x 3mm， 4mm x 1mm， 4mm x 2mm， 4mm x 3mm， 5mm x 1mm， 5mm x 2mm， 5mm x 3mm， 5mm x 4mm. Three layer nickel plating with multiple layers of protection enhances the strength of the magnet and greatly reduces fragility issues.
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