Rectangular Ndfeb Block Square Neodymium Magnet https://www.mlmagnet.com/product/ndfeb-block-square-magnets/rectangular-ndfeb-block-square-neodymium-magnet.html This neodymium block magnet of a rectangular shape is designed with high energy and high attractive force. The surface of the magnet has been anodized to protect it from oxidation and make it smooth to the touch. It makes for a great collection of magnets or can be used in projects where strength is needed such as magnetic toys, magnetic sensors,s and so on. This rectangular neodymium magnet is manufactured using high-quality material and contains no artificial additives. It has high strength, good magnetic permeability, and a working temperature of up to 180 degrees Celsius.