... 2)nickel,black,silver,gold 3)SGS certified Features of magnetic sphere:1)Mateials: NdFeb magnet2)Colors: nickel, black,silver ... :216 pcs/set4) Packing:Round steel box packing1. The magnetic sphere has high remanence, high coercive force, high energy product ... : Widly used in industrial areas and Micro products, such as Motor, sensors, loudspeaker, windmill, Auto, National defence, Speaker, Computer, ...