Magnesium Rod (1 Pound | 99.9+% Pure) Each will be 3” long, and weigh .25 lbs. By Ordering 1 pound you will receive 4 of these quarter pound magnesium rods. We sell this metal by the pound, so if you need 10lbs, simply add a quantity of 10 to your cart. Be sure to see our promotional discounts for certain quantity levels if you would like to save money per pound. Atomic Number = 12 | Melting Point (F) = 1202 | Atomic Mass= 24.305 | Boiling Point (F) = 2024 | Density (g/cm3) = 1.738 |