Blank Discs and Ejector Packs (sold separately).
Each vial contains 50 identical blank test discs, and one desiccation tablet to protect the discs during storage. The desiccation tablet is NOT used during the experiment.
Note: Blank discs contain no additives. They do not contain antibiotics. You may add antimicrobial agents to them when you use them... however they may also be used as a control (no additive)