25 Jul 1 lb Synthetic Black Iron Oxide – Fe3O4 – <1 micron particle size
1 lb Synthetic Black Iron Oxide - Fe3O4 - <1 micron Chemical structure - Fe3O4 particle size - d50 - 0.30 micronsGreat for magnetic silly putty or magnetic slime Shipped in a resealable foil bag View My Other Items For Sale for 2, 5, 10,...