N35 is the industry standard grade. Neodymium disc magnets. Small & Tiny 2mm 3mm 4mm 5mm 6mm N35 N52 N55 rare earth. Samarium Cobalt. Neodymium N52 - High Grade. 6x1mm N52: 0.99lb / 16oz / 450g. 6x2mm N52: 3.04lb / 48.6oz / 1380g.
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