Grav® Joint Size Adapter - Converts 14mm Female to 18mm Female

Grav expansion adapters are designed to increase the diameter of your water pipe joint to make them compatible with larger accessories. This adapter changes a 14mm female joint into a larger 18mm female joint. This straight adapter from Grav is made with premium borosilicate glass and features a 14mm male joint on the bottom while accepting 18mm bowls, bangers, or other glass water pipe accessories on top. You can also use this adapter upside-down to convert an 18mm male joint into a 14mm male fitting.

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