A 15mg micro ampoule of Cesium metal.  Purity is 99.99%.  These small ampoules are very safe to own and present practically no danger if the ampoule breaks.  They are the perfect size for collectors who want a small sample of this highly reactive metal.  These will fit nicely inside a 5/8dram vial and one will be included with every purchase.  Sorry no international shipping (International buyers, your order will be cancelled if it contains this item or any one of the following: Arsenic, Chlorine, Bromine, Gallium, Lithium, Mercury, Potassium, Rubidium, Sodium, Thallium, Thorium, Uranium, Amorphous Phosphorus, White Phosphorus or the Complete Element Set)