Small & Large STRONG NEODYMIUM MAGNET Round Discs ~ 1mm 2mm 3mm thick magnets | eBay
DIYMAG Neodymium Magnets with Hole, 100LBS Heavy Duty Round Base Cup Magnets for Wall, Rare Earth Magnets with Countersunk Hole and Stainless Screws for Hanging, Office, Craft-Dia 1.26 inch-Pack of 8: Amazon.com:
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