5pcs 40 x 10 x 3 mm N35 Strong Block Magnets Rare Earth Neodymium Magnets 40mm x 10mm x 3mm Permenent Square Magnet New 5pcs 60x40x3 60mm 40mm 3mm magnets block neodymium n50 rare earth super strong fridge magnet 60 40 3 60mm x 40mm x 3mm