The Pax 2 Water Pipe Adapter (WPA) by Delta 3D Studios is intended to be used with the Pax 2 Vaporizer without a mouthpiece. It can also be used over a flared mouthpiece. This Water Pipe Adapter works with both 14 mm and 18 mm female bubblers / water pipes. By using this adapter and attaching your Pax 2 to a bong, you can instantly improve your device and take your vaping experience to a whole new level. Cleaning this product is easy, using traditional glass cleaning methods such as hot water, PBW, and isopropyl alcohol. This WPA is also compatible with the Pax 3 Vaporizer.