Borosilicate Glass on Glass (GonG) Water Pipe Adapter (WPA)
Choose from size 14mm or 19mm Male GonG attachment for OG Solo, Air, Solo2, Air2 or Air MAX from Arizer.
Need a storage solution for WPA? Consider the Mini Traveler Tube
Some batches have nubs for additional grip, these aren't in the photo shown here but you may get them on your glass.