Cheap price ceramic ring ferrite magnet for speaker 

Material:

  Strontium ferrite, SrFe12O19 (SrO·6Fe2O3), a common material for permanent magnet applications.

   Barium ferrite, BaFe12O19 (BaO·6Fe2O3), a common material for permanent magnet applications. Barium ferrites are robust ceramics that are generally stable to moisture and corrosion-resistant. They are used in e.g. subwoofer magnets and as a medium for magnetic recording, e.g. on magnetic stripe cards.

   Cobalt ferrite, CoFe2O4 (CoO·Fe2O3), used in some media for magnetic recording.

Grade:Y10,Y25,Y30,Y30BH,Y33,Y35(Chinese standard)/C1,C3,C5,C8(American standard).

Type:Isotrophic ferrite magnet / Anisotrophic ferrite magnet.

Shape:block,cube,ring,disc,cylinder,arc or other abnormal shape can also be customized.

Size:Customized

Advantage:High coercive force, coating unnecessary as to its anti-corrosion and anti-oxidization.