Glass Adapter 19mm Male to 14mm Female. For connecting a 19mm female end water-pipe or rig, to our 14mm male mouthpiece/ adapter. Ditanium All-in-one Vaporizer Enails come standard with a titanium mouthpiece/ 14mm male ground glass joint adapter. This innovative design allows the user to use the mouthpiece comfortably and to connect it to water-pipes and rigs.