30nCi (0.3 gram) Thorium Radiation Detector Check Source Disk

Now is your chance to own a piece of Earth history and a good way to test if your Geiger Counter or radiation detector is working. Contains 0.3 grams of Thorium Dioxide (Th232).

-Approximately 30nCi radiation (1110 Becquerels or 1110 decays per second)
-Releases Alpha, Beta, and Gamma Particles - Disk Measures 1 inch in diameter and 1/8 inch thick
-Thorium is sealed in Epoxy for safety
-Disk Measures 1 inch in diameter and 1/8 inch thick
-Radiation is Dangerous so please be careful when using, handling and transporting this disk. Keep it out of the reach of children, as it is also a choking hazard!