I am selling a US Tubes 8mm Beaker/Tube w/Donut and 16 hole Diffuser Stem. The piece is an 18mm female, but the diffy stem is an 18mm male to 14mm female. I got this piece in a trade, and it is really a solid unit. I use it occasionally with my Underdogs and Persei Vapes. There is a small (superficial) fleabite/nick on the back right of the glass joint on the bottom of the rim. It is not sharp, or in danger of spreading. It was there when I received it, and it never bothered me. I have included pictures below with the nick clearly shown. I do not use it nearly enough to justify keeping it since I got my M&M Tech Leviathan. I am willing to let it go for other glass (bubblers and the like, would love a PENDANT rig!), vapes, Persei parts/units/accessories, Cash, and I will consider whatever else you have to offer. As always pm me for info/to make an offer. Thanks! =) I am asking $200 $170 SHIPPED if you want to do cash. *Piece will be thoroughly ISO'd, and Apocalypse proofed prior to shipping.