Profile Design Triathlon Hydration system Had this on a previous TT bike and used for a few races. Not used for past few seasons so been sat in a draw. This is a great aero solution and easy to refill on the move. The bracket attached to one of the compatible profile design stems. The rubber bit valve is missing I took it off after the first ride as was easier to drink from without. There is a valve you close which stops water coming out. I do have the standard profile design stem and additional face plate that matches, which will list separately. Any questions please ask.