FIRST4MAGNETS SP834R 10 8.16mm O.D. x 3.5mm I.D. 4.3mm Thick N50 Neodymium Ring Magnet C/w 6mm Dia 0.8mm Outer Step 1.2kg Pull (Pack of 10), Set Pieces

Pack of 10 - 8.16mm outer diameter x 3.5mm inner diameter x 4.3mm thick with 6mm diameter x 0.8mm deep outer step Each magnetâ€â„s north and south poles are on opposite circular faces - Each magnet is coated with three layers of nickel, copper and nickel to give superior corrosion resistance and provide a smooth and clean finish, Weight: 0.0661386786 Pounds, Manufacturer: Magnet Expert®