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Czech vintage radioactive glass check source bead is about 8mm x 6mm. These emit enough radioactive rays to easily be detected by our C7061, C21276, CJ304 or C8092.
Geiger Counters. Each lead has a small hole in the center. These glow bright green under UV light. Sold in a package of 5.
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 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
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