An amazing selection of miniature neodymium magnets! This assortment has a wide variety of shapes and sizes of the super powerful Neodymium rare earth magnets. Includes 6 mm spheres; 5 mm cubes; 15 mm x 4 mm bars; 25 mm x 3.5 mm rods; 5 mm disks; 20 mm OD ring magnet; and others. Also includes a sample of iron filings. Uses are endless! More than 80 magnets in all. Exact contents may vary.Note: All Rare Earth magnets, such as neodymium magnets, are made of a ceramic and can be brittle. They are extremely strong magnetically must be handled with caution to avoid damage to the magnets and/or injury. Fingers can be pinched between attracting magnets and magnets can chip or break if allowed to 'jump' at an attracting surface or another magnet. Adult supervision is required.