Just like the magnets you used to play with when you were a kid. Includes five U magnets and tons of steel shapes to play with. Made with Aluminum(Al), Nickle(Ni) and Cobalt(Co) which makes for a super strong and high quality magnet. Perfect for science fair projects! 5 ea. 1" "U" magnet with steel shapes! Contains Aluminum (Al) Nickel (ni) and Cobalt (co) which makes for a super strong and high quality magnet. .