Ceramic Magnet hook Pot material:Steel,Al,Copper magnet material:Ceramic magnet Coating:Cr, ... magnets are made from different kinds permanent magnets and metal pot . Special magnetic circuit make it have superstrong magnetic force , many ... times stronger than the single strong magnet.Material of metal pot: Copper,Aluminium,Steel...Material of magnet: NdFeB,Ferrite,AlNiCo,SmCoCoating ...