4 Pieces of Ceramic Disc Magnets C8 Dia 3 x 1/4" Hard Ferrite Magnets - for Magnetic Therapy and Science Projects, Education and Crafting;

This package of 4 ceramic magnets each measure 3" in diameter and 1/4" in thickness. They're made of a grade 8 ceramic magnetic material and can hold up to 5.67 lbs under ideal conditions.

While not quite as powerful as neodymium magnets, ceramic magnets, or ferrite magnets are an economic solution for applications in which neodymium magnets are either too strong, too expensive, or environmental conditions are not ideal. Because of their extremely brittle nature, caution should be exercised when handling these magnets because they can expel shards if they are allowed to snap together or inadvertently slam against a magnetic surface.