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
Donut Magnets
Magnetic force lines of donut shaped magnets - Stock Photo [3364460] - PIXTA
Searching For Dark Matter With A Donut-Shaped Magnet - Asian Scientist Magazine
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
Donut Refrigerator Magnet
Doughnut-shaped nanomagnets induce new magnetization states – Physics World
Master Magnet 1-3/4 in. Diameter Ring Magnets (2-Piece per Pack) 96604 - The Home Depot