6x3 8x3 10x3 12x3 18x3 Hole 3mm N50 Countersunk Ring Round Magnet Super Powerful Disc. Grade: N50. 6mm x 3mm (3mm Hole) COUNTERSUNK MAGNET. 8mm x 3mm (3mm Hole) COUNTESUNK MAGNET. 10mm x 3mm (3mm Hole) COUNTESUNK MAGNET.
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