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Drilled No. 9.5 Stopper

Drilled No. 9.5 Stopper

✅ In Stock

This drilled stopper, with a #9.5 size, is compatible with a 2000ml (2L) Erlenmeyer flask. The purpose of the drilled hole is to accommodate an airlock, allowing for the release of gases during the process of making a yeast starter.

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