... . 2.Grade:N35,N38,N42,N50,N52,N35H... Education magnets/alnico magnet Material:Alnico1,Alnico2,Alnico3,Alnico5 (U.S.A Standard ... materials ,special care is requierd during handling and storingusually cast and grinded during production,they are available in various grades ... in teaching and playing for children2) Material: hard ferrite or cast alnico3) Many shapes, sizes and colors are available4) We ...