Product Description ------------------- Pack of 1 30mm x 20mm x 20mm 4.5mm hole 4.5kg pull 500 degree Celsius operating temperature Protective epoxy coating This magnet is popular in engineering and manufacturing industries due to its strength, operating temperature and corrosion resistance properties. The Alnico magnets North and South poles are on opposite ends which makes it perfect for classroom demonstrations. Set Contains: ------------- 1 x 30 x 20 x 20mm magnet(s)