- Permanently laser etched 2D code on base, 1D linear barcode and human readable number on the side, ensuring a permanent link between sample and data
- 2D codes readable without removing tubes from racks
- High contrast 2D codes are more reliably readable in frost or condensation conditions
- 100% quality control, each tube is tested to ensure both readability and uniqueness
- Leak tested to ensure sample security
- External thread tubes provide greater working volume than internal thread tubes
- Suitable for sealing with screw caps
- Suitable for cryogenic storage*
*Not for use in liquid phase nitrogen