These custom made Krypton Sunstone Keys are cast in transparent resin and custom dyed to look just like the screen used prop. This is a 1:1 scale replica and measures 5.6 inches (142mm) tall by 1.5 inches (38mm) wide.

The sunstone is a crystal key used to unlock the original Fortress of Solitude on Krypton in the icy wastelands outside the city state of Kandor. This is the sanctum of the Man of Steel's great-great-grandfather Val-El. The key features a modified version of the House El sigil and was given to Seg-El by the time-traveling Earthman Adam Strange. It reveals some family secrets and sets a fateful series of 32events in motion to save Seg-El's future son; as well as Kandor and the whole planet.