This Water Pipe Adapter is manufactured by Delta 3D Studios and is designed to fit the PAX 2 and PAX 3 Vaporizer without a mouthpiece. It can also fit over a flared mouthpiece. This adapter is compatible with both 14mm and 18mm female water pipes / bubblers. Using a water pipe adapter and hooking your PAX to a water piece is the most instantaneous way for you to significantly enhance your vaping experience. You may clean this product with any conventional glass cleaning method, such as with isopropyl alcohol, PBW, and hot water. Also available: Glass Water Pipe Adapter for your PAX 2 and 3.