Magnet Specifications Diameter: 6mm (0.236") Thickness: 2mm (0.079") Magnet Grade: N50 Gauss Strength: 3,600 Pull Strength: 12.1lbs per square inch  WARNING: Contains small magnets. Swallowed or inhaled magnets can attract through and squeeze intestines or other body tissue, causing serious injury or death. Seek immediate medical attention if swallowed or inhaled. Magnetic fields can affect the function of pacemakers or other implanted electronic medical devices.