CMS Magnetics® Grade N52 Super Strong Neodymium Magnet Ring OD1.26" x ID 1/2" x 3/8" - Rare Earth Magnet Ring for Classroom, Science Project and DIY Applications - One Pack: Amazon.com: Industrial
1/2 x 3/16 Inch Strong Neodymium Rare Earth Disc Magnets N52 (20 Pack) | totalElement
3/8 dia. x 1/16 inch thick Round Disc Magnets D61-N52