MagnaCard Round Magnets with Foam Adhesive, 0.75 Inch, Black, 4.9 x 3 x 0.2 inches , 18 Count (20064) Round Magnets use for multi purpose. Craft projects business and home projects Foam adhesive backing School Magna Round Magnets use for multi purpose. Craft projects business and home projects Foam adhesive backing School. Magna