Ferrite Ring Speaker Magnet/Large Ceramic Ring Magnets 1.Dimensions: According to your requirements 2.Grade: Y30,Y30BH,Y30BH-1,Y35 and etc 3.Magnetized: Diametrical,Axial,Thickness,as optional 4.Size:max out dia. 280mm,max thickness 40mm 5.Tolerance:OD and ID 2%,+/-0.1mm for thickness

Customized Ceramic Magnets /Magnet Ferrite Custom 1.Dimensions: According to your requirements 2.Grade: Y30,Y30BH,Y30BH-1,Y35 and etc 3.Magnetized: Diametrical,Axial,Thickness,as optional 4.Size:max out dia. 280mm,max thickness 40mm 5.Tolerance:OD and ID 2%,+/-0.1mm for thickness

Hard Anisotropic Ferrite Magnet Ceramic magnets (also known as "ferrite" magnets) are part of the permanent magnet family and are currently the lowest cost hard magnets. The ceramic (ferrite) magnet composed of strontium carbonate and iron oxide has medium strength and can be used at quite high temperature.