SpecificationsSpeaker magnets: 1) low cost 2) hard and brittle 3) require specialized machining techniques Ring ferrite magnet:Ferrite magnet is sintered permanent magnet composed of barium or strontium ferrite.This class of magnet, aside from good resistance to demagnetization, has the popular advantage of low cost. Ferrite magnets are very hard and brittle, and require specialized machining techniques.Ferrite magnet has Anisotropic and Isotropic two type.Anisotropic grades are oriented in the manufacturing direction, and must be magnetized in the direction of orientation. Have grade: Y8T Y10T.Isotropic grades are not oriented and can be magnetized in any direction. Have grade Y25,Y30, Y30BH ,Y35.Ferrite magnets are available in varieties of shapes and sizes, including round disks, rings, blocks, arc segments, u-shapes, cylinders block etc. The finished products could be magnetized or un-magnetized as user specified.Because of their low cost, ferrite magnet has a very wide range as well as very large quantity of applications, including motors, loudspeakers, toys and craft.In order to quote you the best price, please provide us the following information.ShapeBlock/Rectangle/SquareDisc/Round/CylinderRing/CountersunkDimensionL (?) 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 ?