N52 Neodymium Cylindrical (1/2 x 1) inch Cylinder/Disc Magnets.: Amazon.com: Industrial & Scientific
N52 Disc Neodymium Magnet 25mm dia x 10mm 1pcs/pack
N52 Magnets - Magma Magnetic Technologies
Neodymium Magnet Disk N52 D1″ x 1/8″(A) - Radial Magnets - We Know Magnets
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