Check the listing for details. Magnetite (Black Iron Oxide), 4oz, Reagent Grade, Sturdy Bottle SHIPS SAME DAY. Condition: New. Listed at 8.95 USD. 15.00 Black Iron Oxide Fe3O4 Weight 4 Ounces Volume 4 Fluid Ounces Chemical Formula Fe3O4 Purity Ultra-Pure 99% Grade Reagent Grade Consistency Fine Powder CAS Number 1317-61-9 You are purchasing 4 Ounces (by weight) of Black Iron Oxide. The item ships in a 4 Fluid Ounce Polypropylene bottle. Black Iron Oxide; also known as Synthetic Magnetite / Magnetite / Ferrous Ferric Oxide / Iron (II,III) Oxide; has hundreds of uses. For more information, go to: http://en.wikipedia.org/wiki/Iron_oxide FREE EXPEDITED SHIPPING We ship THREE TIMES A DAY, 7-Days a week. Your item is guaranteed to be in the mail the SAME DAY you place your order. Transit time from California is 2-4 days throughout the USA. Our bottles are made of sturdy polypropylene. We shrink-wrap the screw tops and seal the bottles in plastic to ensure a spill-free journey.