Urmamium is a tough metal-like material that is see-through like glass. This is the stuff I use to keep the sirens in, and still be able to study them. Urmamium comes from heating up and removing all radiation from radium. Now it may seem like it could break easily, but trust me, a one-inch sheet is about the same as 30 sheets of steel of the same length. Pronunciation: (Yur-mam-EEUM)
(NO PUN INTENDED)
