This sample is provided by Dongguan courage magnet manufacturers, the material is sintered hard ferrite anisotropic grades, magnet specifications outside diameter 17.8mm. thickness (height) 7.8mm, one-sided chamfered, with a concave point marking, the surface of the magnetic field strength of 1200 gauss or so, mainly used for solenoid valves, proportional valves, and a variety of other commonly used specifications, welcome to consult the sample.
17.8x7.8mm circular ferrite sample picture;