100pcs N45 UH 3mm x 0.5mm (1/8" x 1/64") Disc Magnets Ultra High Tempe – Magnet Baron LLC
Super Strong Neodymium Magnet N45 3 x 1/2 x 1/4" Permanent Magnet Bar, The World's Strongest & Most Powerful Rare Earth Magnets by Applied Magnets: Amazon.com: Industrial & Scientific
N45 Neodymium Magnets 1/2 in x 1/4 in Disc Dual Countersunk Hole - Applied Magnets - Magnet4less