HardferritesuppliersManufacturs Professional in producing ring ferrite magnets, Young Magnet is one of the best manufacturers and suppliers in China. We have quality ring ferrite magnets for sale. Please feel free to contact us. In order to quote you the best price, please provide us the following information. Product description: These ring ferrite magnets are made of quality pressing and sintering of strontium and iron oxide with high performance, which is durable and reliable. Equipped with beveled edges, our product could make separating the magnets a snap, and discourage damage to the magnets. And the hole allows objects to be attached easier. The nice round surface attractive magnets have a north and south pole side pull and repel. As a matter of fact, they can also be used at fairly high temperatures. In addition, the compact design can fit any kind of occasion. Due to the proper size, these ring ferrite magnets can be widely used in totally different fields, and they are all available for education, science, kitchen, office, building, creativity, craft and so on. Product feature: These ring ferrite magnets are equipped with high resistance to demagnetization, corrosion and oxidation. There is no marks or stains while removing from the board, which is easy to move. Our product is an ideal item in your daily life, and it is available for crafting, jewelry, office boards, and DIY magnets. We do promise that it will never break or fall down even if there's an earthquake. ShapeBlock/Rectangle/SquareDisc/Round/CylinderRing/Countersunk DimensionL (?) x W(? ) xT(?)D(?) x T(?)OD(?) x ID(?) x T(?) L: length. W: width, T: thickness, D: diameter, OD: outer diameter, ID: inner diameter. For other shapes, please tell more in details or drawing would be much appreciated. CoatingZn, Nickel, Ni-Cu-Ni, Epoxy, Au, Silver or other ? Working TemperatureNormal or High temperature ?HardferritesuppliersManufacturs website:http://www.ndfebmagnets.net/permanent-magnets/ferrite-magnets/