... fridge or filing cabinet,adomment, furniture…,and large disc neodymium magnet used in machine and industry…There ... through the thinkness.If you are in our disc magnet,please inform us the information as follows ... :Material:Sintered Neodymium magnetSize: disc magnet,Diameter x ThincknessGrade:N30-N52,N30M-N48M ... N38UH,N28EH-N35EHCoating:Ni,Zn,Epoxy,Silver,Glod,Chrome,Ag,Au,Sn,etc.