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Made from Borosilicate glass
14mm on the inside and 18mm on outside
Converter 14mm to 18mm
The product image serves only as an example. The colors and arrangement of the color applications may differ due to the handcraftsmanship. We reserve the right to give our glass artists creative freedom, which is the only way to ensure the creation of the highest quality unique glass specimens. ! WARNING This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov