J.W. Winco, Inc. offers GN 53.1 Plastic Retaining Magnet Assemblies, Disc-Shaped, Without Thread, in metric sizes. These RoHS-compliant components are a shielded magnetic assembly. They are primarily used for holding drawings and the like. The ND magnetic material is characterized by a high adhesive force. Housing is plastic, available in gray, white or red. Magnet is neodymium, iron and boron, NdFeB (ND type). Sizes range from 18 to 40 mm in diameter. Temperature resistant to 175 °F (80°C).