$53.99 Aliexpress.com : Buy 50pcs N50 Super Strong Rare Earth Magnets 4*2mm Magnetic Round Size Disc 
MASTER MAGNETICS 3/4 in. Neodymium Rare-Earth Magnet Discs (3 per Pack)-07091HD - The Home Depot
50pcs Diameter 4.9mm x 4.6mm N52 Magnet Rare Earth NdFeB Neodymium Permanent Magnet Very 
