Every lungful of air you breathe is mostly nitrogen, a harmless and near-inert gas. It is essential for life as proteins are carbohydrates with added nitrogen. And you also know it as that very cold liquid which tends to shatter anything dipped into it.

With this addition to your element collection you are getting a sealed glass ampule filled with 99.9% pure nitrogen gas inside a Lucite acrylic block five centimeters per side that is beautifully finished.