BuyMagnets.com offers over-molded lattam magnets in a classic rectangular shape. To begin, ferrite magnets are bonded onto a metal plate. Then, a protective layer of black polystyrene encompasses the magnet, causing them to earn the designation of “over-molded.” This protective polystyrene layer protects the magnet from dust, grease, and other environmental factors while also improving the magnet’s function. They can be used in many different applications.