Check the listing for details. 10g Copper BAKED metal powder dust 999+ High purity micron size 99.9%+ purity.. Condition: New. Listed at 7.50 USD. THIS STUFF IS THE REAL DEAL!!!IT TOOK SEVERAL TRIES TO GET THIS STUFF INTO A VERY FINE DUST!!! YOU ARE NOT BUYING COPPER SHAVINGS, BITS OR CLUMPS. IT IS VERY FINE DUST!!! The copper pictured above was not easy to make. It is a very, very fine dust like material micron to probably even nano in size. I know it is micron and smaller cause when I shake the batch copper dust particles easily float up into the air to form a plum. Item: .999+ Fine pure copper micron size dust. 25 grams total. Returns: I understand that some times we buy things that we don't want or need. I will accept returns up to 30 days from arrival and refund 100% of the sale price of the item. Shipping charges are not refundable. Please be sure to leave me positive 5 STAR feedback if you are happy with your item.