This 1 inch diameter ceramic ring magnet is made of strontium ferrite. It is a classic low-cost magnet for demonstration and experimentation. Just put several of these ring magnets on a regular pencil and have bunch of them levitating. Get a few of these for your next science fair project. 

These may come in assorted colors or just plain dark gray.

Size: 1 1/8¡± diameter, 1/4" thick, 3/8¡± inside hole diameter 

Warning: choking hazard Small part. Not for childred under 3 years of age

Recommended for ages 5 and older.

Weight: 0 lb 1 oz ( 0.03 kg )