... 280mmc)Coating: Zn,Ni,Gold,Epoxy,etcpermanent magnet/ferrite magnet/rare earth magnet 1.many styles available 2.low price 3.high ... quality 4.best service permanent magnet/ferrite magnet/rare earth magnet:There are mainly two types of ferrite magnets, barium ... most widely used permanent magnets today. Ferrite magnets are available in varieties of shapes and sizes, including round disks, rings, ...