Grade: N35-N52(M,H,SH,UH,EH,AH) Shape:Disc, Block etc. Adhesive Type: 9448A, 200MP, 468MP, VHB, 300LSE etc Coating: NiCuNi, Zn, AU, AG, Epoxy etc. 3M adhesive magnets is used more and more in our daily life. it is made up of neodymium magnet and high quality 3M self-adhesive tape.