and want to make your experience truly Boundless, then this is the piece you need. It replaces the normal mouthpiece with a universal water tool adapter, meaning you will be able to simply slot it onto any rig with a 10mm, 14mm or 18mm male fitting, or a 14mm or 18mm female. This will cool the vapor and enhance flavor like you never thought possible with a herbal vape. The smoothness will take your breath away. Make your Boundless vape all it can be....