Amazon.com: MIN CI Ferrite Magnets Ring with Holes, OD1.26" x ID0.71" x H0.24" Heavy Duty Round Disc Ceramic Magntes for DIY Crafts Science Projects Industrial, Pack of 20 : Industrial & Scientific
How Long Will Your Magnet Last? 100 years with proper care! | MPI
How can a permanent magnet lose its magnetism? | Homework.Study.com
Do magnets have any effects on human cells? | New Scientist