72mm O.D x 30mm I.D 12mm thick Y30BH Ferrite Ring Magnet 6.4kg Pull

72mm outer diameter x 30mm inner diameter x 12mm thick Each magnet's north and south poles are on opposite circular faces Each magnet can support 6.4kg pull vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness Resistant to demagnetisation and corrosion without any extra coating