So, I been looking at this piece, but guess I would need to ask him to customize to 18mm female…or use the multi connection adapter.
https://oregonglassblower.com/14mm-GLASS-J-HOOK-WITH-COOLING-SPIKES-8-16mm-TUBING-14jhookspikes8.htm
@zylvan, it took a while for the UPS label to actually show...