Master Magnet 10 lb. Round Base Pull Latch Magnets (2-Piece per Pack) 96694 - The Home Depot
TRYMAG Magnets, 30Pcs Strong Rare Earth Magnets Small Round Fridge Magnets for Whiteboard, Heavy Neodymium Magnets Locker Magnets for Crafts, Whiteboard, Scientific Models - 0.47 inch D x 1/8 inch H: Amazon.com: