1.The Strongest magnet 2.Confirm to RoHs 3.With 5 days delivery time. Neodymium Iron Boron (NdFeB) magnets, ... most powerful permanent magnets available today, possess high energy up to 52MGOe and wonderful coercive force.1. Primary Material: Neodymium, iron, boron ... Maximum working temperature: 80-220 degree celcius3. Density: 7.5 to 7.6g/CMM³4. Application: Motors, Windmill, Acoustics, Magnetic ...