magnets are coated with NICUNI coating, then covered with PP-plastic. Red pole is N, and black pole is S, it is very easy to indentify N or S.
we used two tools to make both colors, not only red or black, other colors can available.
The thickness of plastic is 0.5-0.8mm, can protect magnets from damage and corroding effectively.
Because the thickness of plastic is small, magnetic field has not been influenced !
We have being sold 100,000pcs per month to Europe.
Different grade and different colors, or different shapes are available!
Manufacturing process:
Manufacturing Equipment:
Property of magnet for choice:
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