Coated with brightly colored silicone rubber, these ceramic magnet shapes are durable, attractive and fun. Ideal for posting lightweight items, such as reminders, photos, and schedules on refrigerators, lockers, and filing cabinets. Easily repositionable, makes these magnets perfect to use on in-out boards or tracking boards. Makes a great gift idea too. More About Ceramic Magnets - Our hard ceramic ferrite magnets are composed of iron oxide and barium or strontium carbonate. Ceramic magnets exhibit relatively good holding strength for their price, making them a popular choice for many consumer, commercial and technical applications.