Ferrit permanent speaker ring magnet for electroacoustic use

Basic information of large speaker magnets for saleItemsNeodymium magnet raw materialMaterialneodymium-iron-boronShapeavailableDisc,Cylinder,Block,Ring,Countersunk,Segment,Trapezoid,Irregular shapes and more;More shapes can be customized.CoatingNi-Cu-Ni,Nickel,Zinc,Gold,Silver,Epoxy and more.WorkingTemperatureGradeTemp.CoefficientN35-N5280°C (176°F)N35M-N45M100°C (212°F)N33H-N42H120°C (248°F)N30SH-N40SH150°C (302°F)N28UH-N35UH180°C (356°F)N28EH-N38EH180°C (356°F)N30AH