the regular not auto seal its strong and you need one for a mod hookah
The adapters look great, I got a set of the black auto seals - There were a few burrs hanging off the threading and cross bars inside so be careful and remove them before use - Don't want to suck those into your hose - - - bad deal - Also of note, the auto seal adapters do NOT come with a bearing and you will have to purchase them separately - I did not realize this -