40x20mm Super Strong Neodymium Disc Magnet, N52 Permanent Magnet Disc, The World's Strongest & Most Powerful Rare Earth Magnets - Two Piece : Amazon.ca: Home
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