... Balls Neocube M-cube. Bucky Balls. Original M Cube: 216 magnets. Black M Cube: 216 magnets. Mega M Cube: 1000 magnets!. Neodymium magnets ... high quality standard N35 or N38 Neodymium magnet balls.Diameter: 4mm,4.8mm,5mm,6mm,7mm,8mm,9mm,10mm(tolerance ... red ,yellow ,green ,orange or othersMagnetic force(N35grade):5mm 5000-5400guass,6mm 5400-5800guass,7mm 5800-6200guassCertification approved: ...