18mm to 14mm Female Glass Adapter

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This female glass adapter is made of high-quality glass. Perfectly turns your 18mm joint into a 14mm one.

How to clean a glass adapter?
1. Put the glass adapter into a storage bag.
2. Pour the alcohol of 70% concentration or higher in the storage bag, together with some coarser salt.
3. Shake up the storage bag until the water changed to a dirty brown.


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