Lot of 10 Very Strong Rare Earth Magnets. Neodymium magnet also known as NdFeB is a permanent magnet made from an alloy of neodymium, iron and boron.
Neodymium magnets are the strongest type of permanent magnet commercially available. Neodymium magnets can easily lift thousands of times their own weight.

Shape: Square
Dimensions: 15mm x 15mm
Thickness: 3mm
Material: Neodymium / NdFeB
Operating temperature: below 80℃