20~3000pcs 2.5x1.6 Search Minor Diameter Magnet 2.5mm x 1.6mm Bulk Small Round Magnets Neodymium Disc Magnets    strong magnetic

20~3000pcs 2.5×1.6 Search Minor Diameter Magnet 2.5mm x 1.6mm Bulk Small Round Magnets Neodymium Disc Magnets strong magnetic