Extra strong, heat-resistant (N44H) block magnets (10x3x2 mm). This magnets are often used by builders of model airplane who construct their own motors. The stronger the magnet, the smaller and lighter the motor can be designed. Heat-resistant up to 120 degrees.
Of course they can also be used as normal, extra-strong attachment magnets. Be careful when experimenting with these, as they can break easily due to their very thinness.
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