The Flushmount Adapter from Grav (formerly Grav Labs) has an 18mm male exterior that will fit perfectly into any 18mm female connection. The adapter then allows you to use a 14mm male connection transforming your pipe from an 18mm female to a 14mm female connection.

• Borosilicate Glass
• Grav Decal
• Convert from 18mm Female to 14mm Female
• Convert from 14mm Male to 18mm Male
• Joint: 18mm Male/14mm Female