... 02mm Option materials: SmCo, NdFeB, etc. SmCo Micro Block MagnetFeatures: 1, Micro block magnet, which is made with watch stone tooling ... , NdFeB, Ferrite, AlNiCo, artificial jewelry, crystal, ceramic and other super hard materials is available for machining. 3,Tolerance within ±0 ... .005mm to ±0.02mm. Specification of micro block rare earth magnet:ItemLength (mm)Width (mm)Height (mm ...