Amazon.com: Super Strong Neodymium Magnet N48 2OD x 1ID x 1/8" Permanent Magnet Rings, The World's Strongest & Most Powerful Rare Earth Magnets 1 pc : Industrial & Scientific
1X N48 rare earth neodymium permanent super strong magnet 50x50x10 mm with hole | eBay
N48 Neodymium Magnets 1/4 in x 1/16 in Rare Earth Disc - Applied Magnets - Magnet4less