Strong ring magnet painted in smooth shiny black color to increase durability. Outer edges of this ceramic magnet are polished for safety.
Outer Diameter: 29 mm
Inner Diameter: 9.5 mm
Thickness: 6.4 mm
Weight: 18 grams
Magnetized straight through the circle.
Sold in packs of 10, 100 and 1000.
May be used for magnet flotation (Floating rings) experiment and other science and craft related projects.