... rare earth + bag + magnetic 64 magnet cubes 1/4" Neodymium N42GREAT GIFTS! Ships in a box! 1. Materials Neodymium magnet 2. Grades ... . Applications Sensors, motors, rotors, wind turbine,wind generators, speakers, loudspeakers, magnetic filters, etc. 64 1/4" CUBE MAGNETS N42 Neodymium rare ...