I cant say these if these are good or bad, they are a little of both. They are nice n cheap and do what they need to do which is great, it was the whole reason why I ordered them. Bad news they dont fit the cobra hoses. At least not mine. Its no big deal really it was a buck that I spent...I know they will fit the hoses at the hookah bar I go to so I will just bring them with me and no more thumbing the hoses there.