Adapters are a necessity in any smoker's collection. They allow you to connect water pipe and bong pieces together that usually wouldn't work. They come in a variety if sizes and shapes to best suite your needs. These adapters allow for the ultimate set up that otherwise wouldn't be possible.
This Grav Labs 14mm female to 18mm female makes finding the right piece that much easier. you can convert any joint that is too big and make it smaller or vice versa. This adapter will fit any male joint with ease.