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
40 x 20 x 5mm thick Ultra High Performance N52 Grade Neodymium Magnet - 15.1kg Pull
Neodymium Magnet Disk N52 D1″ x 1/8″(A) - Radial Magnets - We Know Magnets