... Zn, Epoxy, Gold, Silver, Tin, Ni+Cu+Ni and Cr3+ZnSize available: 0.5-200mmShape: Block, Square, Disc ... Microphones, Loudspeakers, Mobile Phone, Automobile, Motor, Engines, Printer, Toys, instrument and detecter, Sensors, Generator, Windmill, VCD, DVD, Laser head, Radar ... Magnet Therapeutic ApparatusSincerely welcome you to visit our factory and cooperate with esteemed OEM!! round disc permanent magnets ...