... The Strongest magnet 2.Confirm to RoHs 3.5 days delivery time Round NdFeB magnet with 5mm diameterNeodymium Iron Boron (NdFeB) magnets, ... . Maximum working temperature: 80-220 degree celcius3. Density: 7.5 to 7.6g/CMM³4. Application: Motors, Windmill, ... Acoustics, Magnetic separators, Auto, VCM, MRI, Mobile accessories5. Grade available:N35-N52, N33M-N50M ...