Neodymium Bar Magnets (INDUSTRIAL STRENGTH - 2 PACK) Incredibly Strong 33+ LB Strength - N45 Grade Heavy Duty - Powerful Rare-Earth Metal Neodymium Magnet - 3" x 1/2" x 1/4"

Super Strong Neodymium Magnet N42 4 x 1/2 x 1/4" Permanent Magnet Block, The World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets

Powerful Neodymium Bar Magnets, Rare-Earth Metal Neodymium Magnet, N45, Incredibly Strong 33+ LB Strength - 60 x 10 x 5 mm, Pack of 10

Black Iron Oxide - Fe3O4 - Synthetic - 1 Pound

Iron Filings - 1 Pound Package

Powerful Neodymium Bar Magnets, Rare-Earth Metal Neodymium Magnet, N45, Incredibly Strong 33+ LB Strength - 60 x 10 x 5 mm, Pack of 8

N52 Neodymium Bar Magnet 3x1/2x1/2" Powerful Rare Earth Rectangle Magnet - For School and Science Projects, Cabinet, Crafting and Treasure Hunting Magnets

totalElement Super Strong Industrial Grade 3 x 1/2 x 1/8 Inch Neodymium N48 Bar Magnet (2 Pack)

Delta Education N/S Painted Bar Magnet, 3" Length (Pack of 2)

Powerful Neodymium Disc Magnets 1.26x1/8" w/ 3M Adhesives, Non-Shattering Package Rare Earth Magnet Discs for Home, School & Offices, Like Science, Crafting, DIY Projects & Magnetic Therapy. 6 Pack

DIYMAG Powerful Neodymium Disc Magnets, Strong, Permanent, Rare Earth Magnets. Fridge, DIY, Building, Scientific, Craft, and Office Magnets, 1.26”D x 1/8”H, Pack of 6