Aymagnet 1 piece 40mm x 20mm x 10mm neodymium magnet - very strong magnet moon magnet 1 piece 40mm x 20mm they are magnets whose coating does not tarnish, do not shed, have been subjected to the salt water test, and are resistant to 80°c heat. nickel plated not only makes image brightness, it also makes the magnet 10-15% stronger. more than 100 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.