314-Countersunk-Magnets-2-20mm-Polarity-North-E-Magnets-314-p-E-Magnets-Countersunk-Magnets-are-extremely-versatile-&-unbelievably-powerful-Made-from-neodymium-which-is-the-strongest-type-of-magnet-commercially-available-The-magnets-are-easily-fixed-using-a-simple-countersunk-screw-p-p-Maximum-operating-temperature-180-deg-C-p-p-The-E-Magnets-Countersunk-Magnets-have-the-following-specifications-p-p-Diameter-20mm-3-4in-br-Height-10mm-25-64in-p-p-Supplied