• 25mm diameter x 8mm thick with a 5mm diameter countersunk hole for fixing. • Black. • Each magnet can support 17kg vertically from the magnetic face and 5.2kg in a shear position when in flush contact with a mild steel surface of equal thickness. • 5mm countersunk hole for fixing. Neodymium pot magnets are made of strong Neodymium magnets sunk into a steel shell with a coloured finish. Available in a variety of colours to suit any environment.