Therapeutic Magnets | Ceramic Magnets | Hard Ferrite Magnets
Rectangular or Block Ferrite Magnets | Bunting - eMagnets
Amazon.com: Ferrite Ring Magnets with Holes - 1.26 Inch (32mm) Round Disc Donut Magnets for Refrigerator Fridge, Science Projects, Crafts, Around The Office (Pack of 40) : Industrial & Scientific