These are Ceramic Block Magnets from the Magnet Source.
Not for Children!
Ceramic (ferrite) magnets are composed of strontium carbonate and
Charcoal gray in color
Most common grades of ceramic are 1, 5 and 8 (8 is the strongest)
Lower energy products than alnico and rare earth magnets
Lower service temperature than alnico and rare earth magnets
Metallic in appearance
Tower Hobbies Has Been Serving Hobbyists Since 1971 • Call 800-637-6050 or 217-398-3636
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