I have an HBG Inline perk water pipe/bong for sale. Features are an 18mm male holder into an inline perk. Only been used a few times, and ALSO INCLUDES a titanium nail, a custom 18mm fitted dome, and a hard case for it as well. Absolutely smooth, clean, and 100% perfectly in tact! Asking $200 for it, but price is negotiable. with questions, offers, or for more information about the piece. Thanks!