10 20 50pcs Strong Neodymium Magnets N52 25 x 5mm Countersunk Ring Hole 5mm
5/10/20/50 Pcs N52 Magnets. Countersunk Hole Size: 5mm. Made of neodymium iron boron material, these magnets are plated in nickel-copper-nickel for a smooth, shiny and corrosion resistant surface. Material: Neodymium Iron Boron.