So I have to part with this Bong . I need to make room for another piece and I can no longer comfortably us a straight neck piece (problems with my neck ...bla bla bla.)The joint on this piece is 18mm female . Not looking to get much . Would like to trade for a Bent neck piece ( I am assuming form China and that's fine ) or a sidecar 18mm female is preferable . Something that you are not using and is just taking up space . Going to be using it mainly with a Solo If I sell it I would like $25 +shipping in the us . PM me with questions and offers . Thanks!!!