20mm dia x 10mm thick N52 Neodymium "Strongest Grade" Magnet
Neodymium Disc Magnet
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
Super Strong N52 Neodymium Magnet 4 x 1/2 x 1/2" Block, The World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets: Amazon.com: Industrial & Scientific
Strong N52 Neodymium Magnet 3/4 in x 3/4 in x 1/8 in Block - Applied Magnets - Magnet4less
1 x 1/8 Inch Strong Neodymium Rare Earth Disc Magnets N52 (8 Pack) for Sale | totalElement
5/8 x 1/4 Inch Strong Neodymium Rare Earth Disc Magnets N52 (10 Pack) for Sale | totalElement
N52 Neodymium Magnets 1 in x 1 in x 1/4 in Rare Earth Block