This low profile Glass Adapter from INHALCO has an 18mm male exterior that allows you to turn a 18mm piece into a 14mm. That means you can use a into a 18mm rig.

• Borosilicate Glass
• Convert from 18mm Female to 14mm Female
• Convert from 14mm Male to 18mm Male
• Inside Slide Joint: 14mm Female
• Outside Ground Joint: 18mm Male

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