> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/item-register/consumables/glass-beads-3-mm-50-g.md).
# Glass beads 3 mm
Use with a bead beater or vortexer to break up cell clumps.
{% columns %}
{% column %}
Contact SBT to purchase
{% endcolumn %}
{% column %}
:label: Sales item `GB01`
:package: Pack holds **50 g**
:globe\_with\_meridians: Country of origin **Czechia**
:label: HS code `9033.00.90`
:straight\_ruler: Bead diameter **3 mm**
{% endcolumn %}
{% endcolumns %}
Item no.
Item
Details
GB01
Glass beads 3 mm (50 g)
3 mm glass beads used with a bead beater or vortexer to break up cell clumps.
{% hint style="info" %}
**When to use glass beads**
Use them when your bacteria form clumps or chains, or sit attached to other objects in the sample. BactoBox® counts each of those as one event rather than as the cells inside, so the count comes out low. Streptococci, Bacillus species and lactic acid bacteria are the usual clumping cases.
See [Break up clumps and chains](/advanced/advanced-sample-preparation/break-up-clumps-and-chains.md) for the method.
{% endhint %}
---
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