Handy for displaying papers and documents on any magnetic surface -- including whiteboards and file cabinets. Three sizes and five assorted colors: Blue, Green, Red, Yellow and White, all packaged in a convenient, reusable storage tub. Heavy-Duty—Up to three times stronger than standard magnetic pins. Character Types: Magnetic Pins/Tacks; Character Style: Circles; Character Mounting Type: AlNiCo Magnets; Number of Pieces: 30.