High quality glass vials, all came in good condition and looked very aesthetic so I can't smash the actual product but the dimensions given are inaccurate as they don't mention that the vials have an inner rim that changes the overall diameter. a few millimeters of holes which unfortunately meant it wasn't suitable for what I needed it for. If you need an exact diameter hole for your project, pay attention to the edge, if not, this is a good choice for whatever you do.
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