... . Black M Cube: 216 magnets. Mega M Cube: 1000 magnets!. Neodymium magnets with a colorfull coating ,gold, silver,black nickel, blue ... : Material: Made by 216pcs high quality standard N35 or N38 Neodymium magnet balls.Diameter: 4mm,4.8mm,5mm,6mm,7mm,8mm,9mm ...