Our Lead Wire is sourced directly from the Doe Run mine in the USA where it is produced and is 100% “virgin” metal (not recycled). We sell this Lead Wire by the 1lb increment, so if you need 10lbs, simply add a quantity of 10 to your cart. Be sure to see our bulk discounts for certain quantity levels if you would like to save money per pound. This lead wire is approximately 96 inches long for every one pound and the wire itself is approximately .185 inches in diameter. This lead wire is perfect for adding weight to Pinewood derby cars or any other application where you need to strategically add weight. If you are interested in making a very large order, please contact us directly for pricing and availability. All metal shipments come with a certificate of analysis. This lead wire is very easy to manipulate by hand and cut with wire cutters. It will arrive to you in a vacuum sealed heavy duty BPA free bag. Atomic Number = 82 | Melting Point (F) = 621 | Atomic Mass= 207.2 | Boiling Point (F) = 3180 | Density (g/cm3) = 7.29 | Weight (lbs/in3) = 11.34