Heavy-duty magnets work well on file cabinets or metal presentation boards. They are three times stronger than regular magnets. Reusable tub contains 12 small 12 medium and 6 large magnets in assorted colors (red yellow white blue and green). The small size measures 5/8" in diameter. Medium magnet size is 1-1/8" in diameter. Large magnets are 1-1/2" in diameter.

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