Magnet, Neodymium 20 x 10 x 8 mm. (OD, ID, H) RingShaped.

What can be more fun than a collection of these amazingly strong magnets? Your students are sure to dream up almost as many uses as there are choices. The larger magnets are so strong that children may not be able to pull them off a metal surface! Available as rectangular, cylindrical and ring models in various sizes. Rectangular magnets are measured by: length x height x width. Cylindrical magnets are measured by: diameter x height Ring magnets are measured by: outside diameter (OD) x inside diameter (ID) x height These magnets are so strong that they cannot be shipped safely by air, groung shipping only. Image may vary.