Ceramic Magnet hook Pot material:Steel,Al,Copper magnet material:Ceramic magnet Coating:Cr,Ni,Zn,Epoxy.. Packaging & ... stronger than the single strong magnet.Material of metal pot: Copper,Aluminium,Steel...Material of magnet: NdFeB,Ferrite,AlNiCo,SmCoCoating : Nickel,Zinc ...