Our 12ml Breath Testing tubes have a flat base and a silicone coating baked onto the inside wall of the vial. This coating clearly indicates that an adequate breath sample has been provided without interfering with the analysis. For other types of testing, such as gas detection instruments or gas storage, we recommend our non-coated vials.
These vials are supplied pre-assembled with our high-quality polypropylene caps featuring pierceable butyl rubber septa. A choice of cap colours is available to aid sample identification. Vials can be supplied with or without a vacuum.